He'd better figure it out before it gets focused on him for a change. Senku's not exactly out of brat bracket either just yet, though his competence and (mostly) calm attitude has him acknowledged as more or less an equal for now.

Levi turns his head to stare at the teen for a few long moments. He knows both words separately, but he has no idea if it's supposed to mean something when put together like that. He also has no idea why it's being used on him, as he's never worked with steam of any sort (he may have been called a punk though, especially by the MPs that he was giving the slip to), but figures he's been called worse.

"What."