when you're hungover as shit after a spending a night drunk as a skunk

a "spittle" is something that occurs when you are within striking distance of a small amount of saliva that always tends to have a trajectory of landing on the person you are talking too's face.

A splatted skittle

When its raining but not heavily enough for a raincoat so you just stand there miserable at the bus station and contemplate what is happening to you.

Spittle is to automatically respond to your friend (s) before they even ask the question, since you already know what your friends are going to ask.

To spit semen that was previously ejaculated into ones mouth onto their partners; usually on the face.