The pants you see that one homeless guy on the A train in Chicago wearing. Oh, did I mention he smelled violently of spoiled milk and stale cumin?
"Did you smell that nigga on the train with the assflap pants? Homie was rank!"
A person who believes they have a big dick or twat while projecting a false reality of grandeur or self-importance on to others.
Some people are a legend in their own pants because they tell people they live the high life while living in a dump.