荒唐 (huāng táng): beyond belief; preposterous; absurd; intemperate; dissipated

He spent all his savings on lottery tickets, and this absurd behavior disappointed his family greatly.

That company requires employees to wear pajamas to work; it's simply absurd to the extreme.

He actually believes drinking vinegar can prevent colds; this absurd idea left the doctor not knowing whether to laugh or cry.

Running a red light because you're afraid of being late—such an absurd excuse cannot justify breaking traffic rules.

During the war, people couldn't even eat their fill, yet the government spent money building luxury office buildings—this is absolutely absurd.