when you use words that are the opposite of what you really mean, often in order to be amusing
irony
humorous acting in which the performers fall over, throw things at each other, etc.
slapstick
jokes, funny stories, etc. about the unpleasant parts of life
black humour
a trick that is intended to give someone a surprise or shock, or to make them look stupid
practical joke
a belief or idea of what a particular type of person or thing is like; often unfair or untrue.
stereotype
a way of criticising something such as a group of people or a system, in which you deliberately make them seem funny so that people will see their faults
satire
to not laugh or smile, even though you would like to because something is funny
keep a straight face
using words in a clever and amusing way
witty
