Cork Blocking 

As a bartender, when you're trying to cut somebody off but their friends keep buying them drinks anyway.

I tried to cut the guy off from the wine but his friends kept cork blocking me and buying him another glass.

Cork Blocking by Chip-O December 9, 2008

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 

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 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

Self-cockblocking 

The act of being so stupid that you always ruin every single chance you get at getting laid

Guy1: That guy sucks at getting girls.... Guy2: If only he'd stop self-cockblocking, then just maybe he'd lose his virginity.

Self-cockblocking by Xero _ Manifest October 22, 2010

cockblocking roommate

Somebody who never leaves the room whenever you could fulfill your sexlife. This kind of people disrespect your privacy needs either because they don't give a fuck about you or just simply being an asshole.

"Dude I picked up that hot chick yesterday but I couldn't bang her "
"How comes? "
"'Cause my prick cockblocking roommate were staying in the room all time again, it was the 3rd time he ruined my sexlife "

cockblocking roommate by theRiko June 23, 2016

Cookblocking 

The act of using up ingredients in the fridge so another cannot cook what they intended to

Me: Jim where's the cheese?
Jim: Oh I ate it.
Me: God damn it Jim stop cookblocking me!

Cookblocking by Geekycoconut March 17, 2013