A toilet or bathroom, slang term; also a person who makes crapping (breaking) sounds, or historically a surname.
From 'crap' which has Old English and Middle English roots meaning 'to excrete.' The surname Crapper became famous through Thomas Crapper, a Victorian plumber often (incorrectly) credited with inventing the flush toilet.
Thomas Crapper didn't actually invent the toilet, but he was such a brilliant plumber and marketer that his name became permanently attached to bathrooms—arguably the most infamous case of a real person's name becoming slang.
Complete word intelligence in one call. Free tier — 50 lookups/day.