When you dont have a complete hard on but just a semi hard, and you have a jumbo dick.
Matt: Dude, im jumbo right now
Joe: Holy shit dude i can tell
by Jewel Natural Spring Water October 25, 2009
An antonym For the word Huge or Big.
A bulky creature.
He is such a jumbo man that he can't even walk a yard!!!!!!!!!
by sandy123 October 08, 2005
Replacement for the word "cool".
That's a pretty jumbo car!
by Fat Burger December 03, 2003

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