When you are waiting to return your rental at a Redbox kiosk and the person in front of you is searching through every movie to find the perfect one.
When I returned my copy of The Dark Knight Rises at the Redbox, I was box-blocked for nearly 15 minutes while some jerk wearing pajama pants finally decided on The Best Exotic Marigold Hotel.
by Wordsworth Little January 14, 2013

Like "cock blocking" but instead, it's a friend that, for whatever reason keeps the other two friends of a three friend group from becoming close.
*3 friends get into fight, 2 have been hanging out*
Best friend #1: "Why didn't we become bestfriends before now?"
Best friend #2: "I think (insert friends name) has been buddy blocking us!!"
Friend: "Oopsie." 😳
Best friend #1: "Why didn't we become bestfriends before now?"
Best friend #2: "I think (insert friends name) has been buddy blocking us!!"
Friend: "Oopsie." 😳
by big butt big personality February 8, 2015

The action of unblocking someone and blocking them again on AIM in order to see if they're online. This is about the equivalent of knocking on someone's door to see if they're home, then your nerves collapse and you run the fuck away before they see you. Usually occurs after a terrible conversation, which ends up with one person blocking the other. Of course, this just makes the person they blocked attractive, so they make frequent spot checks to see if you're online.
paranoia bacon: i am so freaking awesome
rosesnguns17: what happened?
paranoia bacon: i just bitched out this hot-ass emo chick, and now she's block-checking me.
rosesnguns17: just make sure you videotape it :):):)
rosesnguns17: what happened?
paranoia bacon: i just bitched out this hot-ass emo chick, and now she's block-checking me.
rosesnguns17: just make sure you videotape it :):):)
by ObeyZod September 15, 2005

brock: nurse joy!!! please heal my pokemon, along with with my heart!!!
misty: not today loverboy
brock: owowowowow!!!!!!</3
pikachu: pika-pi -(why is she brock blocking him again?)
ash:you said it pikachu
misty: not today loverboy
brock: owowowowow!!!!!!</3
pikachu: pika-pi -(why is she brock blocking him again?)
ash:you said it pikachu
by alphapedestrian October 23, 2011

Verb: When a group of guys are simultaneously hitting on a girl and another guy enters in and simultaneously manages to cock block the entire group.
Marlon, Ash, and Baby J were all trying to get with that cute blonde at the bar when Shahty walked up and stole their thunder. He was such a cocks block.
by AshDusky February 20, 2011

Ice blocking last night at Gabriel Park was so much fun, except my bum hurts this morning from all those crashes.
by April July 9, 2004

Cher (at live concert): How many women out here ever been hurt by their man?
women: (all cheers)
men: all cock blocked by one bitch, whence a bukkake block.
women: (all cheers)
men: all cock blocked by one bitch, whence a bukkake block.
by brian pm March 27, 2008
