Girls Locker Room vs. Boys Locker Room

Okay, so you're probably too smart for this, but the meme contrasts how girls might talk about a hard test—like, actually caring about school—with how boys goof off in the locker room. The joke is that instead of being tired, boys are turning a simple cleaning cart into a pretend 'assault vehicle' because they're focused on fun and chaos, not grades. You get it, right?