Well, it was a while ago, but I seem to recall that Washington was very fond of bawdy humor, and wasn't above making "lobsterback" jokes--an early form of "clap humor" similar to Jon Stewart's.    From Wordnik.com.  [The Wit and Humor of Barack Obama.] Reference

There was precious little pity to spare for a lobsterback.    From Wordnik.com.  [Pirates] Reference

"Yonder lobsterback, " he said, affecting insouciance as he set down a box.    From Wordnik.com.  [A Breath of Snow and Ashes]

"Hard for a lobsterback to wash the flour from his hair.    From Wordnik.com.  [Drums of Autumn]