Terrible isn't Synonyms

Terrible replaced

horrible isn't

serious isn't

extreme isn't

Definitions for Terrible

(adjective) causing fear
(adjective) extreme in degree, power, or effect
(adjective) extremely disturbing or repellent

TI abbreviation

TI is an abbreviation for Terrible Isn't

What does TI stand for?

TI stands for "Terrible Isn't"