The sheet came untucked.    From Wordnet, Princeton University. 

Verb (used with object) : She untucked her legs.    From Dictionary.com. 

Marquette's national title year "untucked" jerseys indeed was (image here).    From Wordnik.com.  [Rush The Court] Reference

She untucked her blouse and swabbed the fat of her hip.    From Wordnik.com.  [Xone of Contention]

His work shirt was untucked and opened around the collar.    From Wordnik.com.  [haloaskew Diary Entry] Reference

So I untucked the shirt and pouted for the rest of the day.    From Wordnik.com.  [idiot-milk Diary Entry] Reference

His suspenders were loose and his flannel shirt was untucked.    From Wordnik.com.  [Gas Stations And Good Samaritans] Reference

She wore slim black pants and an untucked shirt of candy pink.    From Wordnik.com.  [The Hollow]

Her braid was gathered atop her head and her blouse was untucked.    From Wordnik.com.  [Devil's Waltz]

Stephen took the jar with one hand and untucked his shirt with the other.    From Wordnik.com.  [Lunatics]

He wore a denim shirt, untucked, faded jeans and dirty-white Chuck Taylors.    From Wordnik.com.  [Butchers Hill]

He fussed with his dark blue shirt, which hung untucked over his new jeans.    From Wordnik.com.  [New York World] Reference

He appeared very disheveled in an untucked blue button-down shirt and jeans.    From Wordnik.com.  [CNN Transcript Oct 20, 2009] Reference

At the pump, he untucked his shirt and shook the puckered wool from his legs.    From Wordnik.com.  [Jim Leo gets a dog] Reference

The haters are out in force, saying that I look sloppy, my shirt is untucked.    From Wordnik.com.  [CNN Transcript Jun 24, 2004] Reference

She untucked her T-shirt from her jeans and yanked on the collar a few times.    From Wordnik.com.  [Honeymoon]

Mr. O'Donnell was looking L.A. chic — untucked shirt, lace-less Vans sneakers.    From Wordnik.com.  [Weekend of a Thousand Stars] Reference

A police officer at the school reprimands a student for having his shirt untucked.    From Wordnik.com.  [CNN Transcript Oct 8, 2009] Reference

Mr. Valvo always leaves his shirts untucked; the style "makes you look longer," he says.    From Wordnik.com.  [A Designer Dresses for a Summer Party] Reference

She showered and threw on a pair of jeans and an untucked button-down short-sleeve shirt.    From Wordnik.com.  [It���s a Maddow, Maddow World] Reference

He wore a blue shirt untucked, with its top two buttons undone, and a pair of khaki jeans.    From Wordnik.com.  [The Man Who Closed Times Square to Traffic] Reference

He sported a teen-chic outfit: an untucked white shirt with a loosely knotted tie and Vans.    From Wordnik.com.  [The Transom] Reference

He was dressed in charcoal slacks, an untucked white shirt and black shoes spackled with mud.    From Wordnik.com.  [Africa Dispatch: Zimbabwe's Diamond 'Monitors'] Reference

"Sometimes I wear my white shirt untucked, sometimes Ituck it in," posts one baffled commenter.    From Wordnik.com.  [Alexis Petridis: Tuckers' luck] Reference

Betsy's green uniform skirt was badly wrinkled, and her white blouse hung untucked on one side.    From Wordnik.com.  [There's Something In A Sunday]

Then meiying looked at their dressing. mei: omg, their shirt's untucked la, and pants so loose!.    From Wordnik.com.  [yanxious Diary Entry] Reference

You now find it completely plausible that she herself smeared her lipstick, untucked blouse, etc.    From Wordnik.com.  [Clinton And The Intern] Reference

The stories began differently and ended the same way, Koko under Ray Ray with the covers untucked.    From Wordnik.com.  [Raisins] Reference

Men typically sport beards, and often wear loose-fitting shirts that fall untucked over their pants.    From Wordnik.com.  [Inside the Iranian Crackdown] Reference

The girl's hair was ragged and short, and she wore a simple, untucked dirty shirt and a pair of brown trousers.    From Wordnik.com.  [Mistborn] Reference

Only the mildest of tyrannies sets this up (a hall monitor who gives detentions for untucked shirts and muddy shoes).    From Wordnik.com.  [Michael Giltz: Toronto Film Fest Day 3: Cartoons, Cads and Commies] Reference

Phillip Seymour Hoffman, accepted the award on behalf of the actors, dressed in a wrinkled blue pullover and untucked t-shirt.    From Wordnik.com.  [Ariston Anderson: And they're off! Gotham Independent Film Awards kick off the season!] Reference

Kelsier took off his jacket and vest, handing them to Dock-son, then he untucked his shirt, letting the long garment hang loose.    From Wordnik.com.  [Mistborn] Reference

A recent outfit she wore included black skinny jeans and a long, untucked black blouse with a long black shapewear tank top underneath.    From Wordnik.com.  [A Stylist Dresses Skinny] Reference