A Kiss ass is commonly known as a person who will go to many lengths to look impressive, good, and worthy towards another person or group of higher social standing.

This is usually due to their need to ascend in the ranks of their workplace, school, or society in general.

In their quest for higher status and privilege, they will become unguarded and their peers will begin to notice how fake and transparent their attempts are.

A Kiss ass will most definetly seem fake due to the fact they don't actually give a shit when people watch how fake they are.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Like a Suck-Up. Some one who kisses the teacher or coaches ass to get on their good side.

Somebody who deliberately ingratiates themselves to authority figures in such a way as to be annoying to their peers.

A kiss-ass, otherwise known as a teacher's pet, brown-noser, or in case of the office, a 'Yes,man/woman', is a person who will constantly suck up to a person in a higher position, hoping to gain attention and/or favor.

They are the ones who are in the office on weekends (usually the only ones there), while everybody else is having fun. Or they are usually the first ones there and the last to leave.

They generally allow themselves to be stepped on, walked over, and shit on, all in the hopes their efforts will be noticed by their superiors.

Someone whose head is so far up his/her superior's ass, they could wear him as a hat.