1) the muscles that flex in the back of your head when you laugh.
2) uncontrollable laughter caused by a nice fatty boombatty blunt.
(guy 1): yo man i'm feelin it.
(guy 2): yo man... me too.
(guy 1): HAHAHAHAHAHAHAHAHAHAHAAAAAAHAHAHAHAHAHAHAHAAAAHAHAHAHAAAA.
(guy 2): yo this nigga guy 1 got the ganoobies.
Choobies(n.) a word that is used by Bangchan(straykids leader) fans for Chan's tiddies after he posted pictures in mischief perfirmance fit showing off them hot tiddies.
"oh look at them choobies, it's too hot"
"I wish I had big tiddies like Choobies are"
venus said "i believe in Choobies supremacy".