fall about with laughter
fall about with laughter
To be consumed by uncontrollable laughter. Primarily heard in UK. We all fell about with laughter when the professor accidentally swore during his lecture. My brother-in-law's wicked sense of humor has us falling about with laughter every time we hang out with him.
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fall about (laughing/with laughter)
(British English, informal) laugh a lot: When he watches Charlie Chaplin films, he falls about laughing. I don’t find them funny at all!See also: fall
Farlex Partner Idioms Dictionary © Farlex 2017