cock up
(ambitransitive, chiefly, UK, Commonwealth, Ireland, slang, mildly, vulgar) To ruin (something) unintentionally; to fuck up, mess up, or screw up.
Etymology timeline
Born ~1948 · 1 year of recorded useSeen in the wild
I Need A Real #cock Up The #ass 🥒🍑😘 #sissy #crossdresser #trans #tgirl #ts #cd #tv #gurl #gurls #fembois #Femboy #sissies #crossdressers #tgirls #crossdress #crossdressing #sissytraning #sissygirls #crossdre…
Walked into work after the bank holiday to get told about a dumb cock up I could have prevented, then went into a meeting where I got a total kicking from a lead in front of the team. What a blast. To the balls.
Definitions
(ambitransitive, chiefly, UK, Commonwealth, Ireland, slang, mildly, vulgar) To ruin (something) unintentionally; to fuck up, mess up, or screw up.
“I Need A Real #cock Up The #ass 🥒🍑😘 #sissy #crossdresser #trans #tgirl #ts #cd #tv #gurl #gurls #fembois #Femboy #sissies #crossdressers #tgirls #crossdress #crossdressing #sissytraning #sissygirls #crossdresserslut #sissy #tgirls #femboi”
— Bluesky· May 2026“Walked into work after the bank holiday to get told about a dumb cock up I could have prevented, then went into a meeting where I got a total kicking from a lead in front of the team. What a blast. To the balls.”
— Bluesky· May 2026
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Semantically related
- 82%
Vulgar slang verb meaning to ruin, spoil, or mess something up — a coarser equivalent of 'cock up' or 'screw up'. The transitive use implies that someone's actions have caused something to go badly wrong. Common in informal speech where stronger emphasis is wanted.
- 79%
(transitive, slang) To mess up; to get seriously wrong.
- 77%
(vulgar, slang, transitive) To ruin; to spoil.
- 76%
(vulgar, derogatory) To screw up greatly; to make a mistake, usually inviting rude/worried comments from others.
- 76%
British slang phrasal verb meaning to mess up, botch, or ruin something through incompetence or poor execution. Can be used transitively or intransitively. Common across British English dialects with the same casual register as cock up or balls up. Slightly more vulgar than cock up but still well within ordinary informal speech. The up adds perfective emphasis, making the mess feel final and complete.