Muggins

noun

1. A fool or idiot (especially as an ironic way of referring to oneself).

   "I suppose muggins here will have to do all the work, as usual."

2. The act of stealing another player's points because they either mis-pegged or counted up incorrectly.
3. A game of dominoes in which the object is to make the sum of the two ends of the line some multiple of five.
4. A card game based on building in suits or matching exposed cards, the object being to get rid of one's cards.