chump up

to squeeze, tug, or otherwise stimulate the penis to a plump, but still flaccid state, generally for appearances.

I was about to climb in the shower when Todd's hot little sister busted in. I was standing there naked, and I didn't even have time to chump up! I don't know which of us was more embarassed.

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pumped up chump

self-infatuation mentally and/or physically

daves' a nice guy for a pumped up chump!

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