Stressballin'
When you squeeze/grope something in the same way you would a stress ball for the purpose of either de-stressing, or having fun.
"Rune, why do you keep grabbing my ass?"
"No reason in particular, just stressballin'"
"Oh, well stop."
"No thanks"
"No reason in particular, just stressballin'"
"Oh, well stop."
"No thanks"