This is a song UC sings in chat to annoy people when she's bored.
I'm a ticking fun bomb, fun bomb
When I explode, I'll explode into fun
Ooh ooh, fun bomb fun bomb.
I'm a fun bomb.
UC can write actually good songs.
She states the song is "It's a song, about fun, and bombs."
As of right now, she has only sang it on the Steven Universe Fanon Wiki.