I've got a good example.

I'm the kind of stoner that ALWAYS smokes people out. I'm very generous with my weed when it comes to my friends. I like being that way, because then I don't feel guilty when I don't have any.

The other night, a friend offers to smoke me out. We drive miles and miles to some "lookout" point. She asks me if I have any weed, I say no. She packs a little bowl, and we pass it around between her and I and our other friend. It's done. She packs up her weed (which was about an eighth) and we leave.

The most ANNOYING kind of stoner is the STINGY STONER. The one who smokes ONE bowl when you've smoked her out (with multiple bowls) many, many, MANY times.