the answer is no she does not know what it means but she can tell it keeps cracking inumuta up because he keeps pausing after she says senpai
therefore she assumes it has connotations she's unaware of
she is somehow unsurprised to hear inumuta is the worst, but at least he's probably loyal
and so far she doesn't hate him, just finds him irritating and useful slash reckless wow

YEAH ANNIE... IS... NOT SURPRISED but she's flabbergasted that starscream is so inept
these childrens cartoons are littered with these sorts of criminals? she's im...pressed

oh god
eventually she just gets fed up and uses someone else as a springboard for a slam dunk
stares over his way ARE WE DONE HERE YET
I MADE THE BASKET THAT IS ALL I HAVE TO DO???
not by climbing people annie that's rude