We found one dictionary that defines the word fall about laughing:

General (1 matching dictionary)

1. fall about laughing: Cambridge Advanced Learner's Dictionary

▸ Words similar to fall about laughing ▸ Usage examples for fall about laughing ▸ Idioms related to fall about laughing ▸ Wikipedia articles (New!) ▸ Words that often appear near fall about laughing ▸ Rhymes of fall about laughing ▸ Invented words related to fall about laughing