Ok, a hit is taking whatever sized drag on anything. It doesn't matter what you're smoking out of, or how big it is, one toke is a hit. What you and your mates do is called 'sinking'. You 'sink' the whole bowl in one go. This probably means you have small ass bowls, cos if all your friends are downing entire bowls and only newbies take multiple hits then you guys must be like the messiahs of weed smoking. I've only seen 3 people sink a full bowl in my life time, and I myself have only sunk a full packed bowl once in my life. One of my proudest moments.

Have a nice night.

Peace