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1.
The act of clenching one's hand in a fist and striking it against another individual's clenched fist, synonym. props
'Yo dawg give me some dapps'
by Jewnior August 26, 2005
 
2.
small bar in Albany, NY, that every Siena student goes to for late night.
tim: dan where you going tonight?
dan: i'm hitting up mad river then dapps for late night
by Huge Binch June 22, 2005
 
3.
To slap someone round the face using your penis.
He fell asleep so i dapped him.
by Bradleyboi October 09, 2007