Katsuki Bakugou from Boku no Hero Academia/My Hero Academia, it's his childhood nickname that Izuku Midoriya (still) calls him.

Ka(tsuki)-cchan

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.

Is a word to call someone if they bring up something embarrassing from when you were five

This is a Japanese word meaning Explosion/Loud. It is also the nickname for the Character Katsuki Bakugou from an anime: Boku No Hero Academia (My Hero Academia). Bakugou's quirk is to let him make explosions from the sweat on his hands. His father's quirk is explosion - which is made from his sweat - is very weak as it has no fuel to power it. Bakugou's mother's quirk is glycerin which will be the fuel to Bakugou's quirk: Explosion. Bakugou is a very explosive person and is usually called this nickname by Deku (Izuku Midoriya)

A nickname provided to the character Bakugou Katsuki from the renowned anime series My Hero Academia.

Bottom, a slut who likes taking things up the ass.

a great king or ruler that also goes by Lord Explosion Murder. His boyfriend calls him “explosion boy.” He’s beautiful in his own...explosive way.