Green’s Dictionary of Slang

(Ling. Fr./Polari) the human face; thus fatcha / fake the fatcha v., to shave, to put on make-up.

1996		H. Young Lex. of Polari 🌐 fatcha face.
2002		Juha ‘Polari’ 🎵 on Polari [album] Beach in the screech. Alamo jo! / This dizzy hoofer gonna dowry jeebo. / Varda me fatcha, meshigner bona. / Savvy you gettin fericadooza.
2019		P. Baker Fabulosa 292/1: fatcha to shave or apply make-up.
2023		R. Milward Man-Eating Typewriter 528: His freshly fatchared carnish.