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1.
When you are done smoking a bowl and you have no pot left but the insides are covered in the left over resin of the pot. You torch that stuff and hit it like a normal hit.
Man i havent cleaned my piece in like 2 months. I smoked all my shit so i thought i was fucked. But dude i got like 10 res hits out of it and got blazed dude.
by djunky4203 August 29, 2005
 
2.
It is when you smoke just the resin from the inside of your piece. If you do it right you should here a crackling noise and it tastes like shittt
"Man i didnt have any bud but i just did some res hits and i cant think right now"
"hahahaha"
by iTz ThE SuPaMaN August 01, 2009