To start laughing suddenly or uncontrollably. The kids busted out laughing when the clown fell down on stage.See also: bust, laugh, out
bust out laughing
Fig. to start laughing suddenly. Bust is a nonstandard form of burst. I busted out laughing when I saw him in that get-up.The bridegroom was so nervous, it was all he could do not to bust out laughing.See also: bust, laugh, out