An obviously underage girl who dresses like a whore...

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

A young girl with too much makeup and not enough clothes.

A girl under the age of 15 who dresses look a whore or with prostitute tendencies.

Young girls who dress like prostitutes.

An underage girl who dresses like a prostitute.

A young girl, usually between 10-14 and commonly 12 or 13, who dresses in revealing clothing. Prostitots are usually young girls who want to be seen as sexy and mature by the older men around them, and therefore end up wearing far too much makeup and dressing in what they think is sexy but simply looks skanky. They usually look like mini prostitutes, which is how the name came about. Prostitots may or may not be interested in sex; some are, and others are simply mistaken about what makes them look grown up and glamorous.

Can also be used as a random, nonsensical insult, though this usage is uncommon.