When someone fucks the lips of a vagina so hard that the forskin of the penis becomes red and soar in a stinging manner. (Basically feels like a sunburn)
Jeff slammed Jane tight pussy so hard that he got lip-burn
The last few tokes you take of a blunt or joint. The burn gets low enough to cause a small yet alarming amount of pain to the smokers lips. Thus was born, burnt lip.
Ryan: "Wow, this blunt is great, you want burnt lip?"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.