Haow duz he getz hiz gruntle bak? ai nebbur did unnurstan dat.    From Wordnik.com.  [Of course I ate him. - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

Poar kitteh haz losted hims gruntle adn haz no moar illusions az wel!.    From Wordnik.com.  [Disgruntled - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

July 16, 2008 at 12:30 pm lotz of tings at werk kan maek u loos yur gruntle.    From Wordnik.com.  [Disgruntled - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

Haow duz he getz hiz gruntle bak? ai nebbur did unnurstan dat. just wut iz a gruntle?.    From Wordnik.com.  [Of course I ate him. - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

There is a little more about it here, where you can also read a short history of gruntle.    From Wordnik.com.  [Back-forming back-formations] Reference

When it forces me to share that with the outside world as well, I lose my gruntle.    From Wordnik.com.  [Original Signal - Transmitting Buzz] Reference

It resembles a series of deep, half-smothered detonations linked together by querulous gruntle.    From Wordnik.com.  [Reminiscences of a South African Pioneer] Reference

"That was unco trouble to mak 'for hersel' in the hearing o 'that auld tyke whose tongue is as rough as his gruntle!".    From Wordnik.com.  [All-Wool Morrison] Reference

And the noise that it sent out was strange and slow, and it did seem to gruntle gently unto itself in that lonesome hollow, as that it had made a long and quiet grumbling there, through Eternity.    From Wordnik.com.  [The Night Land: Chapter 7] Reference

Ai awlwaiz wundurd wut iz a gruntle, ennywai?.    From Wordnik.com.  [Disgruntled - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

And ... shouldn't that be WITHOUT extra gruntle?.    From Wordnik.com.  [One of the newest visitors] Reference

An 'then a grane an' gruntle.    From Wordnik.com.  [The Complete Works of Robert Burns: Containing his Poems, Songs, and Correspondence. With a New Life of the Poet, and Notices, Critical and Biographical by Allan Cunningham] Reference

An’ then a grane an’ gruntle.    From Wordnik.com.  [Halloween] Reference

With extra gruntle.    From Wordnik.com.  [One of the newest visitors] Reference

Haz lost himz gruntle.    From Wordnik.com.  [Disgruntled - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?] Reference

(I’m assuming that ‘gruntle’ is not a word!).    From Wordnik.com.  [Back-forming back-formations] Reference