On Tuesday’s The Late Show With Stephen Colbert, Louis C.K. took shots at Donald Trump. The comedian isn’t known for his biting political commentary; he usually takes shots at himself. In an interview with Colbert, C.K. said, “He’s just a gross, crook, dirty, rotten, lying sack of s***.”

He explained the difference between people who occasionally tell lies and people who seem to enjoy telling lies. C.K. put Trump in the highest category of liar, adding, “I don’t think his name is Donald Trump.”

He joked that if Trump walked into a room and said that he was walking before C.K.’s very eyes, he wouldn’t believe it.

The Late Show With Stephen Colbert airs weeknights at 11:35 p.m. on CBS.

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