1 definition by Xx420kronick420xX
When you and/or a few friends smoke up, and are so high, you have taken off on Flight 420. When you come down from said high, you have landed.
Brandon: Dude, I'm not feelin it.
Deryck: Man, I'm on flight 420.
Brandon: Wait, hold on... I just took off.
Deryck: Man, I'm on flight 420.
Brandon: Wait, hold on... I just took off.
by Xx420kronick420xX August 13, 2009