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

A shambles. Sounds vulgar, but may not be; it may be a grouse shooting term. Customarily, shooters employ beaters to disturb birds on the ground and drive them into the air towards the guns. Normally one only shoots grouse hens, so if the beaters were by mistake to put up a grouse cock, they would warn the guns not to shoot by shouting "Don't shoot! It's a cock up!"

Can also be a transitive and intransitive verb.

One's whole shoot today was a disaster - one cock up after another. Now where's Camilla, the slapper? One feels like giving her a Dirty Sanchez. - Prince Charles

Another day, another cock-up - Tony Blair on the Iraq situation

The whole Iraq situation has cocked up badly - Tony Blair on the Iraq situation

I really cocked up Iraq, didn't I? - Tony Blair on the Iraq situation

cock-up by Tony and Cherie Blair July 21, 2006

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

Another word for screw-up or screwup; to err.

Nothing goes right - it's just one cock-up after another!

Cock-Up by mrbadguy23 December 28, 2005

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

A complete push up except without using one's hands, and instead using one's cock.

That fools doing cock-ups, is that even possible?

Cock-Up by Toxic Rage November 19, 2004