Top Definition
a catchy name for a 'fist bump'. where your fist hits another person's fist in a victorious manor.
dude, give me a five whack!
by sugarbear35 December 23, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×