The expressions your mother wears combat boots and your mother wears army boots descend from the African-American tradition of the Dozens, also known as sounding or capping or snapping, where people try to top each other’s insults. This is...
“You’d better behave, or I’ll knock you from an amazing grace to a floating opportunity!” This African-American saying, used as a motherly warning, first popped up in the 1930 play Mule Bone by Langston Hughes and Zora Neale...