1 definition by HanPie

Top Definition
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.
by HanPie July 07, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×