Definition of "Plum" :
noun: a highly desirable position or assignment
"A political plum."
noun: any of numerous varieties of small to medium-sized round or oval fruit having a smooth skin and a single pit
noun: any of several trees producing edible oval fruit having a smooth skin and a single hard stone
adverb: completely; used as intensifiers
"I'm plumb (or plum) tuckered out."
"Fell plumb in the middle of the puddle."