cockblocking 

one guy ruining another guy's chance to score some booty

That fucking punk-bitch took my seat at the bar and eventually took home the girl i was talking to. He was totally cockblocking me.

cockblocking by WillyStyle November 9, 2007

cockblocking 

Adding a retarded programme on a friend's computer so he sees flying dicks on his screen and his computer is fucking blocked. yeah.. really.

Yuks is a cockblocking legend.

cockblocking by The Flying Dick November 10, 2009

cockblocking 

The act of publicly inviting someone (typically via social media) to suck your dick and then blocking them, presumably before getting your dick sucked.

Maj Toure is cockblocking up a storm on Twitter today.

cockblocking by thesilverduke January 4, 2021

Cockblocking 

A true dick move

Jonathan: “hey asshole, go cockblocking somewhere else, bitch!”
Generic asshole: “no. Also, fuck you, imma steal your girl.”

Cockblocking by The ceo of shit Cold War guns July 16, 2021

cockblocking 

KAREEM

move and stop cockblocking twin

cockblocking by gos loveme August 16, 2023

cockblocking keyboard 

The keyboard that was shown at the beginning of the 'Hell To The No' number in Season 2, Episode 16 of Glee. It is the 'cockblocking keyboard' because the scene before 'Hell To The No' was the scene of Kurt and Blaine's first kiss. Right before they were about to show Kurt and Blaine's steamy second kiss, the scene cut to the angle of this keyboard, thus instigating a cockblock among the Klaine fandom.

Person 1: What's so special about this keyboard?
Klaine shipper: It is the cockblocking keyboard of evil. I WANT MY SECOND KLAINE KISS!

cockblocking keyboard by itcouldhappen--neversaynever September 13, 2011

Cockblocking coalition 

A well coordinated group effort attempting to interfere with your chances of scoring

Her friends formed a multi-layered cockblocking coalition that was impenetrable.

Cockblocking coalition by EddieWins September 10, 2019