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2.
Like the act of slapping hands aloft in celebration, often seen deployed in bowling alleys by embarrassing parents who have achieved something that in sporting terms is fecking simple - akin to sneezing, this relates to the usually unwelcome brushing of balls, man on man..mid threesome.
"I caught a glint in john's eye and I knew he was in her arse. I hopped on top and slid into her gently. As my balls brushed his, I screamed - HIGH 5!!!!"
by furball69 April 08, 2010
 
1.
Something you say when someone has said so wonderful and brilliant.
Person 1: OMG... This lesson sucks!

Person 2: High 5 on that
by PeanutButterJellyTime January 09, 2008
 
3.
stealing, racking....making out with the goods with out droppin a sheckle...to learn the art of stealing
we high-fived (high5s) that brew from the deli
by Ebenezer April 11, 2006