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5.
Something that would seem completely retarded while sober, seems like the best idea you have ever heard while under the influence of Marijuana.
Dude 1 - "Dude, my friend was smoking some pot the other day and jumped off the roof of his house onto a trampoline and broke his arm."

Dude 2 - "I bet he thought it was an awesome idea."

Dude 3 - "Yeah, that's some stoner logic."
by Wahahahaha! October 26, 2009
 
1.
Whenever someone makes a completely stupid comment but thinks that their comment makes alot of sense
Pam: I was walking my dog when a deer ran into me, I thought it would move out of the way and not hit me

Phil: Let's blow up this can of WD-40 and set it on fire

That's fucking Stoner Logic for ya.
by Tha_Woodmeister November 26, 2007
 
2.
The roundabout way you have to convince certain stoners of things. Common tactics include using their delusions against them, inductive leaps, and citing universally held stoner beliefs.
Stoner: Woooo! I am mighty!
Neighbor: Dude thinks he can fly. Don't argue, or he'll jump to prove it.
Friend: What am I supposed to say?
Neighbor: Dunno. Use stoner logic.
Friend: Hey Lawrence! Where's your cape and mask, man?
Stoner: Oh shit! Um...
Friend: Lawrence, get your ass back in the house before everyone knows your secret identity!
Stoner: Shhh! I'm goin'! Quite sayin' my name!
Neighbor: Well played.
by Doctor Fishopoulis February 20, 2007
 
3.
-Adjective + noun:
A phrase used to describe the straightforward, simplistic and often immature reasoning that those under the influence of cannabis exhibit.

Conclusions based upon stoner logic are often non-destructively hedonistic, with the pursuit of further pleasure and happiness being the object. Contrary to the misinformation spread during modern cannabis prohibition (See, reefer madness), stoner logic tends to be manifest in a mostly harmless fashion. Those ignorant to how stoner logic works may see weed-smokers as unreasonable, but anyone who's been there before understands the desire to have fun, be happy, and feel comfortable.
Tobias: "Hmm, if peanut butter, tuna, ham, turkey, swiss cheese, ranch dressing, ketchup, and mayo all taste good on their own, they must be delicious together!"

Mike: "Watch it man, that some serious stoner logic you got going on. It'll be quicker and probably taste better if you just make a ham and swiss."

Tobias: "Haha, you're probably right, but it all looks so good!"
by The Big Zabowski October 13, 2010
 
4.
When a stoner suddenly thinks that almost every word in the dictionary has something to do with marijuana.
An example of classic stoner logic.

Purple- Extremely potent marijuana, specifically marijuana buds that have a purple hue to them. Also accompanied by a fragant, usually fruity smell and mad perma-grin.

- I thought it was simply a color..
by Ilackimagination December 19, 2009