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2 definitions by Ol' Prospector

 
1.
When you're smoking weed and you take a hit and you hold in 100% of the smoke from the inhale, exhaling *zero* smoke from the hit. Done in order to get maximum effect from the weed. Requires great skill and is worthy of respect from other smokers.
"Yo I was ripping a B with Joey Fatone the other day and he was totally zeroing every time ... insane!"
by Ol' Prospector October 18, 2009
 
2.
The skill of holding in all the smoke from a hit of weed. A mark of experience and/or natural skill. Also known as "zeroing"
"Yo man can you pull off The Complete Hold?"

"Not with the monster rips I'm pulling off this huge bong, but maybe if we roll up a joint ..."
by Ol' Prospector October 18, 2009