mugginsmug‧gins /ˈmʌɡɪnz/ noun [uncountable] British English spoken informalWord Origin
WORD ORIGINmuggins
Origin:
1800-1900 Probably from the name Muggins, linked with ➔ MUG1 4
used humorously to mean yourself, when you feel stupid because you have let other people treat you unfairly: Everyone disappeared after supper, leaving muggins here to do the washing-up.