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2.
to get the blood flowing to the penis without necessarily being in a sexual situation.
My doctor is a hot woman and I needed a testicle exam. Being it was a freezing cold day I needed to chub up before she came in the room.
by glenn1907 April 01, 2007
14 4
 
1.
to enlarge the penis without making it look erect, just to get the blood flowing. Making it look flacis, but slightly longer/thicker than normal

to unshrink the penis
he needed to chub up a bit before she came in the room, so as to loosen up his shrunk penis
by Notsob November 13, 2006
30 5