not yours.

a word that dumbasses use to mean possession.

A word that dumbasses use to show possession.

1. A word used to tell people that something belongs to you.
2. A place, usualy a underground tunnel where ores or precius stones are being gathered and shipped off.
3.(to mine)The act in MMORPG's to keep gathering the same resource.
4.A device made by/for the military, it is a bomb, usualy flat and cilinder shaped and hard to spot becouse of camouflage coloring, that has some kind of trigger to detect if a person or vehicle is near, they are bad, bad things becouse after a war, the ones who placed them dont clean them up and they stay there until a random person walks on it and dies/loses limbs.

The use of this improper grammar most likely branched off from the contraction mine's (or mine is). For example "Your ice cream is vanilla, and mine's chocolate." Somewhere along the line, someone forgot that "is" is already part of "mine's" and they made the mistake of saying things like "Mine's is strawberry" or (Mine is is strawberry).
Eventually, the singular form of the word was completely dropped from the vocabulary, and "mine's" became used to show all ownership, even when adding "is" is inapplicable.

Not yours. I'll kick your ass if you touch it.

Used in an exclamitory way to proclaim that something is yours.