Facebook Shark

a Facebook user who logs on and lies in wait for someone else to log on, so that they can immediately trap them in a conversation.
Hm, I think I'll log into Facebook.
2 seconds later:
new message from Jason: HEY!!!!!
Damn, what a Facebook Shark.
by PoisonPen May 24, 2009
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Facebook Slam

Verb. The act of denying a friend request via Facebook. It can also be used in the past-tense form, 'Facebook slammed.'
Random Person: May I be your friend?
Me: Absolutely not. FACEBOOK SLAM.

Me: Hey man, I totally just Facebook slammed that bitch back to Kean University.
Friend: Serves 'em right.
by Garden State May 05, 2008
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Facebook fucking

v. The act of sexting or phone sex over Facebook chat
1: Hey Betty! Guess who I was Facebook fucking yesterday?
2: idk! Was it Evan?

1: omg! Yeah!
2: oh boo, you whore.
by Sassafras.Honeybadger January 05, 2012
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Facebook Shaggin'

When you leave the room forgetting to close your Facebook and your friend updates your status to say something gay/embarrassing/uncool.
Seth Hummer: just gave my first blow job. It was the best thing i have ever done with my mouth.

Justin Chelf: wtf hummer, you faggot.

Seth Hummer: somebody's been Facebook shaggin' me.
by Seymourbutts5 November 12, 2009
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Facebook relationship

A couple that seems to only date through facebook and not in the real world.
Brittany and Adam seem like their not even going out!

yea they have a total facebook relationship
by Idiptoastinchili November 10, 2010
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Mexican Facebook

The tinted back window of a Latino's car that is adorned with various names, stenciled faces, and RIP messages.
The Mexican Facebook page on the back of that El Camino has four different faces on it.
by Glenny Glen Glen April 26, 2011
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Facebook twitch

1. When a person is on Facebook so much that their eyes twitch to the bottom right-hand corner, checking to see if they have any notifications purely out of habit, even when they are on a website that is not Facebook.

2. Less common: When a person uses Facebook so much that they respond to non-Facebook-related situations (sometimes in the real world) in ways that would only be used on Facebook.
1. I was on Urban Dictionary the other day, where there are no notifications, but my Facebook twitch made me check the corner every two seconds.

2. Her Facebook twitch was so bad that when she saw me eating a muffin, she proceeded to shout out that she'd like to 'become a fan.'
by Nicobeans April 27, 2009
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