spit on

spit on (someone or something)

1. To expel saliva or phlegm from one's mouth onto someone or something. I really wish you wouldn't spit on the ground like that—it's really gross! The man spat on me as I walked past.
2. To eject or expel an object from one's mouth onto someone or something. In this usage, a noun or pronoun is used between "spit" and "on." Someone spat their gum on the ground, and it got stuck to the bottom of my sneaker! Make sure you don't talk with your mouth full—you don't want to spit food on your date!
See also: on, spit
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

spit (up)on someone or something

1. to eject spit onto someone or something. (Upon is formal and less commonly used than on.) The angry crowd spit on the convict. Don't spit on the sidewalk.
2. to spew spittle onto someone or something while talking. (Upon is formal and less commonly used than on.) I always have a fear of accidentally spitting on someone in the first row while I am talking. I regret spitting on you, but it was an accident.
See also: on, spit

spit something on(to) something

to expel something from the mouth onto something. You shouldn't spit your gum onto the sidewalk! Don't spit your gum on the pavement.
See also: on, spit
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in classic literature ?
Here floweth all blood putridly and tepidly and frothily through all veins: spit on the great city, which is the great slum where all the scum frotheth together!
Spit on the city of compressed souls and slender breasts, of pointed eyes and sticky fingers--