What does GTFU GTFU GTFU mean?

GTFU GTFU GTFU meaning in Urban Dictionary

GROW THE F.CK UPUsed when adults are acting like children GTFU- Grow The Fuck Up.An acronym made use of frequently by RA's, Power-nerds also precocious minorities expressing their particular disapproval of the numerous vapid, immature individuals one comes across. Acronym for "have the fuck up".