bottle booger 

The dried up bit of substance crusting at the opening of a bottle that impedes the flow and sometime ends up in your dispensed portion. Often found on mustard, ketchup, and lotion. (See also lotion booger.)

Cindy: "Mom, Danny just flicked a bottle booger at me."
Danny: "See, it's just ketchup."
Mom: "Danny, stop picking bottle boogers and eating them!"

bottle booger by jasonspsyche February 6, 2018

Battle Booger 

A form of the watersport boogering mainly recognized by its brutal outcome and bloody injuries. Two people booger behind a boat at a high speed and punch eachother with the goal of stayin up on their board and knocking the other into the glistening blue surface of shame (also known as water)

"Lets battle booger, im sick of doing freestyle"
"Dude i can beat your ass at battle boogering"

Battle Booger by Mattypoo January 19, 2006