A no-ass is a person who does not have enough muscle or fat in their posterior to be able to support a pair of pants. No-asses often don't know how to use overalls or belts. The typical no-ass is not very active and will often be labelled a 'skater'. The only way for these people to know how to wear pants so that they don't drop to their wearers' knees every 10 feet is by forcing them through a course where they will try endlessly to find a way to wear their pants so they don't fall.
That no-ass over there should learn how to use a belt. Hell, if he can't afford one, I'll be more than glad to buy it for 'em.
While walking, I saw a no-ass bend over to pick something up he had dropped, and almost threw up when I saw his pants hanging so low his entire ass was exposed. Wearing underwear of course.
That no-ass should get a belt, looks like he has to raise his pants almost every ten seconds to keep them from falling down to his knees.