The act of getting "dirty" in the morning via sexual activity, not showering, and fulfilling the subsequent desire for breakfast afterwards; usually late in the morning due to morning activities.
"Got plans tomorrow, darling?"
"Nothing in particular."
"Perfect, want to dirty brunch?"
"Oh, you dog--you know I do..."

"How was your morning?"
"It was swell, the Mrs. and I went dirty brunching and picked up a couple items at Lowes."
by Jack O'Reidy July 14, 2013
Get the Dirty brunching mug.