She/they is a set of pronouns. Everyone and everything uses pronouns, and she/they is simply a set of pronouns. Such as he/him, she/her, they/them, neopronouns, etc. People who use she/they pronouns use these pronouns because they are comfortable with both she/her pronouns AND they/them pronouns. They can also be comfortable with even MORE pronouns than those.

A short version of she is.

She is _____.
In the blank, you can insert your favorite adjective.

she/theys are the baddest bitches ever, they are always beautiful/amazing and are so kind. she/theys can pull off any look without even trying.

Some chick that has apparently had sex with over 95% of the male population and over half of the female. She has also made the same comments over and over again about the size of the penis and the length of the sex.

A meaningless phrase used by adult(?) male Hispanics in Santa Barbara, California. It is mainly used to greet each other as well as annoy passers-by.

an awesome green day song with a good beat and great drum sequence; the premise of the song is a girl who is caught up in society, but is trying to be an indivdualist (the whole point of punk rock)

The common target used in the jokes "that's what she said". She is commonly refered to as a whore, slut, or any other name for a sexual dirtbag, seeing as she is normally saying something that refers to something that could happen during sexual intercourse.