cock up 

British slang for a mistake

It's my ass on the line and I don't want a cock up!

cock up by Biggie Wilson June 9, 2005

cock up 

To make a complete mess of things. Derived from the traditional archery usage where, if the 'cock' feather was uppermost, the arrow would not fly straight.

That was a real cock up.

cock up by Tawera March 29, 2008

cock up 

to mess something up. used primarily in England

also see fuck up

past tense: cocked up

That flaming retard Bush sure cocked up that war!

cock up by Kono January 23, 2004

cock up 

is when your working on sumthing and you fuck it up

your working on a peice of work nd you fuck it up good,

"oh decent cock up"
or
"fuck i cocked that right up" etc

cock up by wattsy.08 May 9, 2008

cock up 

When you're getting a slight boner in public, and you go into the bathroom and flip it north so it is held up by your pants. Usually is held up by tightening your belt.

"Dude, I had the worst cock up today".

cock up by buttholebabbbyyyyyyy February 18, 2015

Cock Up 

(1) (Noun) The act of not fully inserting one's penis in an other's vagina or anus until about to cum and then just before one is going to cum, the full erection is thrust into the vagina or anus. (2) (Verb) To not fully insert one's penis in an other's vagina or anus until about to cum and then just before going to cum, the full erection is thrust into the vagina or anus.

The girl thought he was fully inside her while having sex until he gave her a cock up.

Cock Up by Dieselboi February 3, 2010

cock up 

1. To have sex with
2. To put your penis into
3. To fuck up

1. I cocked up your MOM!
2. I like to cock up dogs!
3. I really cocked up my relationship!

cock up by Mark December 21, 2004