Karaoke isn’t fair when you’re a comedian. The whole idea is to get people laughing and enjoying themselves, and I’m a professional funny guy.

Rock is joking about the mismatch between karaoke’s premise—ordinary people taking a turn at performance for communal fun—and a comedian’s professional skill set. As a “professional funny guy,” he can reliably steer a room toward laughter, which makes the game feel “unfair” because the point isn’t to showcase expertise but to share the risk and awkwardness of amateur performance. The line also nods to how comedians read crowds and control tone; even in a setting centered on singing, Rock implies he can hijack the spotlight through humor. Beneath the gag is a reflection on celebrity: public expectations and practiced stagecraft can distort casual social rituals meant to be egalitarian.