UA was holding a camping trip in a few weeks so they were holding an assembly to educate the students that were going.

Bakugo: "HEY! Shitty hair! Bug eyes! Cat Face! Sparky! Tape arms! Get your asses here I'm having you in my group!"

He was pointing to you, Kirishima, Mina, Denki and Sero.

You were 'cat face', according to Bakugo. An unimaginative play on your quirk.