Crap

From Middle English crappe ('chaff, grain residue'), from Old French crappe ('siftings, waste'). The scatological meaning is attested by the 18th century. The common attribution to Thomas Crapper, the Victorian plumber, is a folk etymology: the word predates his birth by centuries. Crapper did exist and did manufacture toilets, but the coincidence of name and product is precisely that.

The word's agricultural origins are well documented: 'crap' referred to the leftover husks and residue from threshing grain, later extending to any waste or refuse. The leap from agricultural waste to bodily waste was natural and likely occurred in spoken English well before it appeared in writing. Thomas Crapper (1836–1910) did not invent the flush toilet, but his name on cisterns throughout England certainly reinforced the association. The word's vulgarity has always been mild; it exists in a register below 'shit' but above clinical alternatives, making it a frequent choice for speakers who want to express contempt without strong profanity.

Mild. Acceptable in most broadcast contexts and increasingly common in print. 'Crap' occupies the useful linguistic space of being recognizably vulgar without being genuinely offensive, which accounts for its frequency in situations where stronger scatological terms would be inappropriate.

Used across all major English dialects with little variation. In British English, 'crap' may refer specifically to a game of dice (from the French craps), adding an additional semantic layer absent in American usage. The phrase 'crapper' for toilet is more common in British than American English, partly due to the lingering cultural memory of the Crapper brand.