The shiny and wet appearance of a male's penis when it's heavily covered in saliva;
Shiny appearance including mild or heavy foam/(little bubbles) ; froth, on male genitalia as a result of being in someone's mouth;
Excessively / sparkling clean.
"So what did you guys do last night?"
"We just watched a movie and smoked some bud and then she spit shined my dick. The usual."
"I see."
Using ones own saliva to give something, or someone (if you're into that) a shine that's so lustrous it makes Jesus himself turn away from its blinding reflection.
"Hey Tom, how'd you get your car so shiny?" "I can't even see."
"I spit shined the shit out of it and it really paid off."