non-swimmer
n.— «“Everybody kowtowed to the stereotype that black people were not good at swimming.” A South African colleague showed just how unquestioningly this received “wisdom” was accepted. Under apartheid, he recalls white racists using the term “non-swimmers” as a euphemism for blacks.» —“Different strokes” by David Owen in U.K. Financial Times July 29, 2005. (source: Double-Tongued Dictionary)