idiot

stupid

Showing very little thought or good sense; the opposite of clever.

crazy

Very silly or strange, or not sensible.

fool

A person who does silly things or who does not think before acting.

angry

Feeling very cross because something is wrong or unfair.

mistake

Something you do or say that is not right when you did not mean to get it wrong.

jerk

An unkind or stupid person. It is an informal insult, milder than a swear word but still rude.

wanker

A British insult for a man the speaker finds arrogant or contemptible. It is built from "wank" but says nothing about what the person has actually done. Medium strength, and one of the commonest insults in British speech. Recognise it, do not use it.

dope

An informal word for illegal drugs. It can also mean a silly person.