isbt 

InSide BeauTy

Isbt his face is ok

isbt by Isbting April 8, 2022

isbty 

the definition is: i shit bigger than you..

ME: ill kick your ass next time i see you!!!
COACH: shut the fuck up isbty, you little fuck.

isbty by Barry Lattimer October 6, 2011

Isbtfs 

Stands for "I swear by the fucking stars," used while texting.

It is used similarly to istg, which means "I swear to god."

"Isbtfs, next time she says something like that I won't restrain myself from yelling at her"

Isbtfs by <-worm-> June 3, 2024