More than 50% of a dividable object. Often used in reference to foods or liquids.
1. There's a better part of a gallon of milk left in the refrigerator.

2. There's the better part of a meal in that doggie bag.
by Stargoat August 1, 2011
A phrase meaning to not let courage outweigh good judgment; is the potential outcome worth the risk?
Kid (10 years old): I really wanted to punch that boy for what he said dad, but I thought his parents would probably sue us, so I didn’t.
Dad: Wise decision, son. Discretion is the better part of valor. I’m proud of you. What’d the kid say that made you so mad?
Kid: He said mom was a whore.
Dad: What?!... Why didn’t you beat the shit outta that kid!!
by |SaltyJack| January 12, 2019