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1.
uber douchebag, someone who is begging to be slapped in the nuts but you cant so you call them a Jackoffasaurus.

Also the better form of calling someone a jackoff.

Or someone who jacksoff to much.
Billy:Dude Your Shirt is gay.
Sean: stfu you Jackoffasaurus.
Billy:*Cries
Alex:Nice dude
by Sean Wheeler January 08, 2008