A term used to describe any form of cannabis/weed/marijuana that is so potent it makes you feel like you're time travelling... even when you're standing still in one place.
First used by Mak Bird in Las Vegas, Nevada circa 2006/2007
Dude, that shit was so powerful, I started remembering shit from when I was five! That's that BACK TO THE FUTURE weed!
After coaxing your partner and getting them quite horny, ask him/her if them want to fuck. If he/she says yes, proceed to hit 'em very hard once in the head to knock them unconscious. Now fuck 'em hard. After he/she regains consciousness, ask them again if they want to fuck. Repeat until the answer is "no"
Last night I pulled a Back to the Future on Lisa and fucked her 3 times before she turned me down.