Hiatits Share definition Flag A combination of the words “hiatus” and “tits”. Coined by Elizabeth Gillies, it’s defined as a break from baring one’s chest/showing one’s cleavage. “If my boobs fall out of this top one more time, I swear I’m going to take a month long hiatits and wear nothing but crew neck sweaters.” Hiatits by 238T January 27, 2021 Get the Hiatits mug.