A person of undeniable sexual appeal. Their slight weirdness is the power behind the attraction, a curiousity of personality.

When eating something (usually when inebriated) and whatever you're eating tastes unusually better than normal. Yummy Tasty

When you buckle your seat belt, when you usually drive without one.

Highly pleasant to the taste. Beyond delicious. Just short of being so good where it would make you slap someone's momma. It's origin from statements such as "That was so damn good that it made my knees buckle."

When you are in desperate need of a vape

The act of sexual intercourse.
Most likely in an car.

Someone or something that makes the snatch, or in other words reproduction organ of a woman, buckle up or close for business.