MUGGINS Meaning of MUGGINS in English ■ noun ( plural same or ~es ) Brit. informal a foolish and gullible person (often used to refer to oneself).OriginC19: perh. a use of the surname Muggins , with allusion to mug 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004