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When a chick rubs the area of a man's body where his ball sack connects to his penis with her thumb(s).
The prostitute will give thumb jobs for five dollars.
by Tom and Mike June 19, 2006
Sucking someone's thumb, miming the action of oral sex.
"You gave him a thumbjob?!"
"He seemed to enjoy it!"
by JonnyJJ September 09, 2007