\Mug"gins\, n. [Etym. unknown.]
1. A game of dominoes in which the object is to make the sum
   of the two ends of the line some multiple of five.
2. A game at cards which depends upon building in suits or
   matching exposed cards, the object being to get rid of
   one's cards.

\Mug"gins\, v. t.
In certain games, to score against, or take an advantage over
(an opponent), as for an error, announcing the act by saying
``muggins.''