tosser noun [ C ] UK offensive uk / ˈtɒs.ə r/ us / ˈtɑː.sɚ / an offensive word for a stupid or unpleasant person: Barry's such a tosser.

Tosser This term, meaning one who engages in self, erm, stimulation, is a milder version of w**ker, which – perhaps you’ve noticed this too - Americans have recently adopted but serially misuse. They seem to think it’s one of those British slurs that doubles as a term of endearment. It’s not.

A: “Tosser” and “twee”—sounds like a UK law firm. Well, both of these British terms are derisive, but to varying degrees. The slang noun “tosser,” dating from the 1970s, is pretty high on the incendiary scale.