-to add more details (true or not) to a story or discussion.

The opposite of a turkey mayonnaise sandwich, having some street to you, and some cultural flavor

The act of throwing a pepper in a girl's face to make her sneeze at the same time she climaxes; since sneezing is an 8th of an orgasm, she will have 9/8 of one if done correctly.

The act of pulling loose pubes from your genital/taint area and sprinkling them ever so gently on a sleeping parties face as if sprinkling garnish on a completed dish.

Experienced, certified, expert, mature, well-rounded or well-trained

Experienced in a particular field or activity. Knows the ropes already and doesn't need training or instructions.

Surprisingly calm, cool, and collective on a certain situation or scenario, especially one that has been dealt with several times before. (financial issues, haters, etc.)

"Seasoned" is the opposite of "salty."
The term comes from "seasoning", a form of condiment similarly used to salt, the origin word for "salty".