Potblock 

To block someone from hitting more marijuana, usually mid-rotation on a piece or bleezy or spliff. Similiar to a cockblock.

Potblock scenario
Ronald was about to take his hit
Zackary says, "No I think you have had enough man." and sticks his hand in front of the piece, blunt, spliff.

Potblock by Willup December 19, 2008

potblock 

One who prevents another from smoking marijuana, either at a party or in an informal situation.

I wasn't able to get high last night because Kim was a potblock.

potblock by HanPie July 7, 2009

Potblock 

A mental block instigated once sober on imagined and creative ideas/visions conceived or envisioned whilst high.

Guy 1: "Dude, I had a bitchin' idea for creating world peace toking yesterday."

Guy 2: "What was it?"

Guy 1: "Can't remember, totally potblocked ."

Potblock by Zonkles June 17, 2010

Potblock 

What someone prevents you from making a pot contact because said person benefits from being the middleman/woman

Her cousin Dave keeps potblocking me from meeting the grower because he doesn't wanna give up his middle man fee or the extra $5 he charges you on top of the grower's $10/gram charge. Dave is an dickhole.

Potblock by Soytugitana December 11, 2016

popblocked 

when you open up a soda can and somone else comes out of nowhere to take the first sip, subsequentially claiming it their beverage

I cracked open a mountain dew and that bastard stright up popblocked me

popblocked by J.P. Palmer May 24, 2007

Pot Block

When one is about to smoke some pot and something happens to keep you from doing so.

Johnny was just about to light his joint when his mom walked into his room with the DEA. What a pot block.

Pot Block by Jewish Lady December 29, 2010

potblack 

Totally NOT fictional sexual relationship between James Potter and Sirius Black while they were at Hogwarts.

"OmG i ReAd sOmE wElL fIt PoTbLacK tHe OthEr Day!!1"

potblack by Moohead<3. August 21, 2007