What Does โCock sth upโ Mean?
โCock sth upโ means to make a mistake or mess something up, especially by doing it badly or carelessly.
Introduction
The phrase โCock sth upโ is a common British English phrasal verb used to describe when someone makes an error or fails at a task. Understanding the Cock sth up meaning helps learners recognize informal language often used in everyday conversations. It is usually used to talk about situations where a plan or action goes wrong because of someoneโs mistake or poor handling. This phrase is informal and can be used in both personal and professional contexts to highlight errors or mishaps. Learning how to use โCock sth upโ correctly will improve your English fluency and comprehension, especially in casual settings.
Quick Info Box
- Phrasal verb: Cock something up
- Type: Transitive
- Level: B2 (Upper-Intermediate)
- Short meaning: To make a mistake or spoil something
Structure (Grammar Rules)
โCock sth upโ is a separable phrasal verb, meaning you can place the object between โcockโ and โupโ or after the whole phrase.
- cock something up
- cock up something
Example: She cocked the project up. / She cocked up the project.
How to Use โCock sth upโ?
You use โCock sth upโ to talk about mistakes or failures when something goes wrong because of poor effort or carelessness. It is informal and often used in spoken English. The โsthโ stands for โsomething,โ which can be any noun like a task, plan, or job. You can use it when blaming yourself or others for errors.
Examples
- He really cocked up the presentation by forgetting his notes.
- Donโt cock up your chances by arriving late.
- They cocked up the booking, so we had no hotel room.
- She cocked up the recipe by adding too much salt.
- We cocked up the schedule and missed the deadline.
Common Mistakes
- Incorrect: I cocked up on the test. (missing object)
- Correct: I cocked up the test.
- Incorrect: He cocked the up plan. (wrong order)
- Correct: He cocked the plan up.
Differences / Synonyms
Similar phrasal verbs include โmess up,โ โscrew up,โ and โbungle.โ
- Mess up: More common in American English, meaning to make a mistake or spoil something.
- Screw up: Informal and slightly stronger, meaning to make a serious mistake.
- Bungle: More formal, meaning to handle something clumsily or incompetently.
โCock sth upโ is mainly British and informal, often used in everyday speech to criticize mistakes lightly.
Common Collocations
- cock up a plan
- cock up a job
- cock up a project
- cock up an opportunity
- cock up an arrangement
Real-life Dialogue
Anna: Did you finish the report?
Tom: I tried, but I think I cocked it up. I missed some important details.
Anna: Donโt worry. Letโs fix it together before the meeting.
Practice
Fill in the blank:
They really _______ the event _______ by forgetting to send invitations.
- a) cocked / up
- b) cocked up
- c) cock up
Answer: a) cocked / up
FAQs
- Is โCock sth upโ formal? No, it is informal and mostly used in spoken English.
- Can I use โCock sth upโ in American English? It is mainly British, but Americans may understand it.
- What does โsthโ mean? โSthโ is short for โsomething.โ
- Is โCock sth upโ rude? It is casual but not very rude; it just means making a mistake.
- Can I use it for big mistakes? Yes, but usually for everyday or medium mistakes.

