look up any word, like cleveland steamer:
 
71.
when you are excited about getting a girl who you really like and a stupid dumbfuck fucks it up for you!
otis scrivner cockblocked me last night, so now i'm going to jack off on his face!
by Texas Tech guy who got cockblocked November 12, 2004
 
72.
a person who can't get any at that particular time so they make sure that any attempts that are made on or by you to get some sexual satisfaction are thwarted so that they are not lonely
i wanted to get some at home but my friend keeps calling even though they know we are getting "busy"
by Cathy October 18, 2003
 
73.
The less attractive of the two. She'll ruin your approach, flow, and groove. She will stand in the way of you making your move. Insert your best friend to run interference for a couple of plays. Get some and then break up with the girl saying that you don't want to see her anymore because of her annoying friend. Problem becomes solution.
John blocked the cockblocker so I could knock it with Cheryl. John ditched the cockblocked after eating all the candy bars that she had in her purse. I got laid and then broke up their friendship (for her own good) and now it's Saturday.
by Christopher Handsome March 28, 2003
 
74.
Cock is another word for penis & normally when you 'block' something you are either stopping something, or preventing something from happening. the term is normally used when you a preventing someone from having sex.
mike..."i am so fuck off right now"

mikes friend..."why"
mike..."i were getting to know some hot chick last night and she were getting all up on me, then peter walked in the room and then this hot chick got up and walked off"
mikes firend..."wow peter is a total cock blocker"
by duttyriddem July 19, 2010
 
75.
A jerk Someone who interupts an act or conversation such as
Ie: grinding or Flirtatous conversation
Roots of orgin: my friends locker , english decent ( the american kind)
example:stop bieng a cock blocker!
by Kip0130 March 15, 2007
 
76.
roommate who's afraid of penis and can't stop talking... she also wants every guy to want her, but won't do anything when she has them in her bed. tries to prevent roommates from getting any, at all times. BIGGEST COCKBLOCKER EVERRRR
Elizabeth never has sex... her goal in life is making sure her roommates have even less sex than she does. she is a cockblockin bitch... and she knows it
by i want some ass March 29, 2004
 
77.
A cock Blocker is a person close to you or of just general aquaintence who prides him or herself in screwing up your chances of getting a sexy time with a girl you're trying to get with. He or she does this by saying wildly innappropriate things about you or your potential sex partener. Or by just making the situation awkward by doing something stupid to either or both people. This block's the boy's cock from getting in a girls's smock.
1."dude, did your friend just slap my ass?"

"he's not my friend anymore (goddamn cock blocker!)"

2. jack is cuddling with jill and jimmy comes around the corner. jimmy says as he passes by: "hey jack, how's your aids?" jill says: "you have aids? maybe we shouldn't do this" jack says "ima kill that sonofabitch"
by Your MOMMA said im hot September 08, 2010