laugh
noun
lɑːf 
læf 
1 [countable] the sound you make when you are amused or happyto give a laugha short/nervous/hearty laughHis first joke got the biggest laugh of the night. see also belly laugh2 a laugh [singular] (informal) an enjoyable and amusing occasion or thing that happensCome to the karaoke night—it should be a good laugh.And he didn't realize it was you? What a laugh!3 a laugh [singular] a person who is amusing and fun to be withPaula's a good laugh, isn't she?Idioms
do something for a laugh/for laughs
to do something for fun or as a joke
I just did it for a laugh, but it got out of hand.have a (good) laugh (about something)
to find something amusing
I was angry at the time but we had a good laugh about it afterwards.My family and friends all had a good laugh at my expense.