An erection achieved mainly by young inexperienced boys when dancing with a lady friend usually at junior or senior high school dances. Often not entirely hard but in between soft and hard.
"Man, that girl was so fine, my slow dance chub grew in my trousers while I was dancing with her."

"My slow dance chub almost exploded in my pants while dancing with that foxy lady"
by Tonyhw Neb March 31, 2009
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When you're dancing erotically with a girl and you start to feel a half chub coming, so u try to stop dancing, but she goes hard and just starts jerking you off with everyone around, and you just go with it.
Dude, I was dancing with this girl, and she dance chubbed me right in the middle of the dance floor
by CrashBoi June 24, 2017
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