I don't get it. What does that mean?

Zurreak said:

I don't get it. What does that mean?

In her secretary lines, she's singing "mogu mogu" which is apparently from 'moguru' (to submerge). And in her other lines, she's being mocked as "mogura" (mole) because of that.

I got that info from the kancolle wiki alone, perhaps there's a better explanation.

Who said that?

Who the fuck just said that?

Who's the slimey little communist shit twinkle-toed cocksucker down here who just signed his own death warrant?

"Mole" here can also refer to Maruyu's origins from the IJA
....As in, she might be a spy for them.