When you're late after spending too much time eating a greasy meal and in the process of running you let out small flatulence at separate intervals synchronized with your steps so that it sounds like a MACHINE GUN. MACHINE GUNNING.
When you wreck an entire team with a CBJ on their host in Call of Duty Ghosts. You must get an ace though if you do not complete the full ace you do not fulfill "out gunning."
A "glue gun" sticks two things together.
"Glue-gunning" means "to use a glue gun.
"Love" "glue-gunning" means to use a figurative glue gun to stick two people together,
or at least specific parts of their anatomy.
Can be characterised by excessive jaw motion whilst hammering a piece of chewing gum, wide eyes and a streched out gob contorted into numerous positions.
Can also be used to refer to those smashed out of their tiny little trees on top quality skunk.