1. A gambler who depends on underhandedness or trickery in order to win a game of dice.
2. One who attempts to surreptitiously collect yahtzee dice before the previous roller has conclusively decided on a category.
3. A straight up ho.
"John turned out to be a dicegrabber, so we murdered him and threw his body in the river."
"That fuckin' dicegrabber yoinked my shit before I could decide on 6's or three of a kind."
"That tramp is a dicegrabber fo sho."