1. A word used to acknowledge the presence of a fellow companion
2. For a man to express interest in a particularly impressive female specimen
3. To contact via telephone

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

it depends upon the context in which you are using the word.
1.)a term used to try and talk or try an "hook-up" with a female.
2.)meaning to talk to someone or telling somebody to hit u up later

interj. 1. an exclamation of greeting. 2. an exclamtion used to show excitement or enthusiasm. verb. 1. to call. 2. to summon

A greeting that seems recent, but was used as far back as Shakespeare's time.

Synonym to every verb in any language known to man.

1-Expressing approval for a statement or suggestion.

2-Word used to somehow gain the attention of another person.

3-yes