An erection. See also "Chubby" and "hard on"
Damn. This is a big chub.
by Anonymous July 16, 2002
When you become a little erect but its just enough for people to notice.
So i was working out today and Jessica bent over right in front of me. I looked down to see myself chub and though, shit.
by bzw605 October 22, 2014

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