Ftumch is the name of a devil, played by David Rappaport who appears in the third episode of the first series of the British sitcom The Young Ones, entitled Boring, first shown on BBC2 on 23 November 1982.
The premise of his appearance is that if anyone utters his name then he shall appear, yet he doesn't appear very often because 'Ftumch' is such an unusual name. He is heard to say 'No-one ever says Ftumch. Why couldn't I be called William?'