With "It's Always Sunny in Philadelphia" returning this week, Kaitlin Olson explains what bad words you can expect from her character Dee Reynolds in season 9.
HitFix caught up with the actress at the San Diego Comic-Con back in July.
She also addresses the evolution of insults and cursing, the future of Dee's nerve-wracked stand-up career and weird fan behavior, which is always on full display at Comic-Con. There's even a cameo from one of her "Sunny" co-stars.
"It's Always Sunny in Philadelphia" returns tonight on its new channel FXX.