From Longman Dictionary of Contemporary Englishsomebody is a (good) laughsomebody is a (good) laughBritish EnglishFUNNY used to say that someone is amusing and fun to be with I like Peter – he’s a good laugh. → laugh
Examples from the Corpus
somebody is a (good) laugh• I notice Harding is collapsed beside McMurphy and is laughs ing too.• Dennis is laughing, head held back.• What you want to do is laugh, but everyone is afraid to laugh.• Her head is thrown back, and she is laughing.• Across the room, a table of young men in fitted shirts is laughing heartily and splashing out wine.• I can't understand what is said, but one of the technicians is laughing.• The banter between us is a laugh. 