There are so many slang words related to dating in the US. I have conducted some research and put together a useful glossary. (definitions may vary depending on individual’s interpretation)
Relationship statuses
* Friends with privileges: these two have a no attachments, purely sexual relationship
* Friends with the hope of privileges: situation where one (usually the guy) hangs around hoping for a moment of weakness from his/her friend, who probably hangs out with this person for the attention they get from them
* Going out: two people having a casual relationship; not necessarily exclusive
* Dating: two people going on multiple dates, usually refers to an exclusive relationship but still casual and non-committal
* Seeing: two people seriously having an exclusive relationship
Activities
* Hook-up: can be from kissing to having sex; usually occurs during parties when both parties are severely intoxicated
* The shutdown: the hookup attempt with a shut down, followed by weirdness.
* One night stand: two strangers having sex for the first and only time