Top definition
Hitting somebody or something with all your effort and might.

using either your hand or full body to intensify the impact.

you can also get a running start, that is the true jam smack.
"Cory was standing by the pond so i ran up behind him and jam smacked his ass into the water!"

"if you don't stop talking about football i'm going to jam smack you!"
by dbrown907 January 08, 2010
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Jul 25 Word of the Day
A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy
My bf and I used to really get it on together, but now it's just the occasional cumpadre wank
by Gladys Pipps-Knightley May 14, 2007
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