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The state of a man's penis whilst he is sleeping. Not necessarily totally limp, yet not totally hard. First coined during the 9/3/2014 episode of the Daily Show with John Stewart.
If I don't upload nude photos they will break into my house at night, yank off the covers and snap a picture of me and my slumber chub! Daddy's gotta rest Jon.

Dude, I hope someone doesn't get a picture of my slumber chub while I'm sleeping!

I totally had slumber chub the other morning when I met my mom and dad for coffee.
by Zags fan September 05, 2014
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