A often misused term used to describe smoking marijuana using a pipe by people who do not know anything about the terminology of blowin on doja.
Idiot-"Dude i think the reason i have been sick is all the weedpiping ive been doing."
Dude- "What the fizuck are you talking about? Weedpiping? Don't bring that weak shit in here!"
An epiphany one has while high. The smoker will think that they have made a new descovery. They will then proceed to tell other fellow smokers about their great new idea/thought, or write it down on paper to show later.
Thinker: Hey dude, imagine if we weren't the only ones here? How bout if there are creatures living amoung us that we've never heard or seen of?
Thinker's friend: DUDE did you just make a weedpiphany! Here's some paper, write that shit down!