Definition of muggins
plural muggins
1 a
:a provision in many games played in England that if a player fails to record an earned score promptly his opponent may say muggins and claim that score
—used especially in cribbage and dominoes
b
:a dominoes game identical with sniff except that the muggins provision is included
c
:any of various card games in which a score overlooked may be claimed by saying muggins or in which the player with the worst score is called muggins
—used especially in children's games
2
:simpleton
- had seen too many muggins come bowing and smiling
- —Enid Bagnold
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