DP Idiom
deadpan
with an expressionless or emotionless face He had a deadpan expression when he told us the story.
DPG
Dogg Pound gangsta
nigger in the woodpile|nigger|woodpile
n. phr.,
slang Something unexpected that changes a situation; a hidden factor or trick.

Racist and offensive, but commonly used in the past.
I knew there had to be a nigger in the woodpile, because the man was being much too generous. When the salesman gave him an extra tire for his bike, the boy suspected a nigger in the woodpile.