1. The loud crashing, whooshing sound made when water is thrown on a fire or something else which is very hot, also resulting in a large poof of steam.
2. Can also be used to describe any similar sound - kind of a POOF! or a WHOOMPH! type o' thing.
1. You know, Im thinkin o' makin some smores. Any o' youse gonna want so <CHOOM!!!> WOAH shit guys! I think the tide's comin in!
2. You know, Im thinkin o' makin some smores. Any o' youse gonna want so <CHOOM!!!> WOAH shit guys! My hand just exploded!
Alternative spelling of tume, i.e. tumourous: resembling tumours (unwanted, typically cancerous growths of tissue). Used to describe unpleasant/undesirable phenomenon. The words choomah (tumour) and choomourous (tumourous) can also be used to similar effect.
Spelling is associated the Choomah monsters found on Choomah Island, as featured on Australian cartoon comedy series The Big Lez Show.
Ethan: Ever since I slept with those two prostitutes I've been getting huge genital warts on my ballsack.
Andy: That's absolutely choom.
Nick: Bro that's bare choomourous, you should get that checked before Kayo finds out.