More on Dicers' Oaths from Infoplease:

• Dicers' Oaths - Dicers' Oaths False as dicers' oaths. Worthless or untrustworthy, as when a gambler swears ...
• William Shakespeare: Hamlet, Act III, Scene IV - He will come straight. Look you lay home to him: Tell him his pranks have been too broad to bear with, And that your grace hath screen'd and stood bet
• Dictionary of Phrase and Fable: D - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "D"