Don't listen to those wiseasses in the meeting—they're just pretending to know everything.

wiseasses 是 wiseass 的复数形式，由 wise（聪明的）和 ass（驴子、笨蛋）组成，字面意思是"自作聪明的人"。这个词带有贬义，指那些自以为很聪明、喜欢卖弄知识但实际上很愚蠢的人。