Smack Cam 

When some bastard puts loads of whipped cream on their hand and smacks you in the face, they usually record it.

Euan: I'll smack cam Billy tomorrow!
John: I'll film it and post it on Facebook!

Smack Cam by Anon201320142015 September 29, 2013

smack upside the head 

To extend your arm so that your hand is below the back of a person's head and thrust your hand upwards so that your palm hits them square in the back of the head.

This is typically done when someone does something stupid or just to humiliate/annoy them.

When Rose started to take diet pills, her mother gave her a smack upside the head to knock some sense into her.

As John sat in the passenger seat, the driver acted like her was streching, but really smacked John upside the head and hillarity ensued.

smack upside the head by ByRd May 23, 2007

Smack Off 

Once a year, by invite only, Jim Rome lets his callers insult each other and various sports figures. Sort of the way he insulted Jim Everett by calling him Chris. Except Jim R. got Smacked by Jim E.

You can only be invited if you were stupid enough to sit on hold for 3 hours on one of his previous shows just to insult someone. If you call got racked (accepted) you could be in the smack off. I prefer the Snatch Off. Where Hookers and Clones get together and do the nasty. Fat guys like the snack off. Nothing like cheetos and masterbation. Orange Julius anyone?

Jeff in Richmond won the smack off once. And he sucked. Sean usually wins, because he blows rome before the show.

Smack Off by The Silk Brah March 12, 2008

Smack a Bitch 

When someone really needs to get sent back to their senses, You smack a bitch. Either the person acted out of line or was offensive in one way or another; so you smack them, back-handed or open-palmed, either way it needs to be a quick and across the face.

Yo that hoe came all up in my grills, so I just had ta smack a bitch.

Smack a Bitch by RamK October 5, 2006

smack the piss 

To drink alcohol, usually in copious amounts.

Are we gonna smack the piss this weekend or what??

smack the piss by markuz August 24, 2005

smack that 

To have sex from the back, hit it from behind, doggystyle. Doing this hard and fast so that it makes a smacking noise.

That girls hot, I want to smack that.

smack that by jennw January 13, 2007

smack one out 

reach male orgasm via masturbation, especially as done within a time limit or before another activity

I usually like to smack one out before going to bed each night.

smack one out by smackingoneout May 22, 2012