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Getting an erection!

When the male organ becomes enlarged due to sexual arousal or physical stimulation.
I swear when that girl was grinding on me in the club, I was chubbing the whole time!
by Kurt91 January 14, 2017
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3
Cruising local hot spots picking up extremely fat chicks for a night of sexual pleasure.
"Hey man, don't forget the bag of flour, we're going chubbing tonight".
by Schmeat May 03, 2007
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4
"a game played by military personal in basic used to score points for cigarettes or other putlawed items. involves whipping penis out and smacking someone with it. more points are givin for varied "chubs" such as no handed chubs, and one legged chubs"
"G.I. JOE was chubbing the back of my head"
by eric w. July 17, 2003
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6
The act of lying one's body into a chubby ball, usually done by guinea pigs.
Look at that cute guinea pig chubbing, looking all pudgy and chubby.
by Guineasandchis July 13, 2018
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