busting /ˈbʌstɪŋ/adjective 1noun 1forms 3 adjective1 •(informal) Urgently needing to urinate. Alternative form of bursting.Can you tell me where the toilets are? I'm busting.The kid is busting to go to the toilet. noun1 •(informal) The process of something being broken or exploded.O, sir! the explosions, the blowings-up, the bustings, the firings! There was bombshells flying about as big as houses. — 1874 formsbustings · more busting · most busting