be in stitches, beguile the time, break up, burst into laughter, burst out, burst out laughing, burst with laughter, bust a gut, cachinnate, cackle, chortle, chuckle, crow, drown care, giggle, go into convulsions, guffaw, ha-ha, have a ball, have fun, hee-haw, hee-hee, ho-ho, horselaugh, kill time, laugh, laugh outright, live it up, loosen up, nearly die laughing, relax, roar, roar with laughter, shake like jelly, shake with laughter, shout, shriek, snicker, snigger, snort, split, split with laughter, tee-hee, titter, yuk-yuk