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.

Facebook Slam by Garden State May 4, 2008

Facebook Slam 

Sending a friend request so they see who the slam is from, then immediately blocking them. When they click to accept OR click on the profile of the sender, it sends you to the FU screen that facebook puts up when you're blocked. The message says:

"Sorry, this content isn't available right now
The link you followed may have expired, or the page may only be visible to an audience you're not in."

This is a rather personal way to be a gigantic steaming piece of shit.

"I facebook slammed my exe's friends, who I never spoke to on facebook anyway, but I want to showcase what an asshole I am, so I sent them friend requests then immediately blocked them."

Facebook Slam by Leaving Commiefornia December 15, 2016

Facebook Slammer 

One who masturbates to pictures on Facebook

I walked in on Conor Facebook Slamming! Why doesnt that nigga just watch some porn! I had no idea he was a Facebook Slammer...

Facebook Slammer by Datt Nigg September 12, 2010