When a female or male gets female or male partner and hangs out with them so much that everytime a friend calls there always doing something with their partner and never have time for you. Their partner is included in all their plans and are they are rarely ever away from them. On those very rare times they are away all the do is talk about their partner and even leave early to go see their partner.
You: Hey whats your plans for the night? i felt like i havent seen you in a long time!
your friend: Well i have a movie date then were just going to back to the house. we should meet up another time! ill talk to (their partner) and we will arrange something
You: okay talk to you later ( you not sounding surprised at all ,uttering the words boyfriend girlfriend syndrome)
A friend to have a casual relationship with only for the purpose of filling a temporary relationship void.
Usually present in long-distance friends that choose not to have a long-distance relationship or friends that lead very busy lives and don't want the hassles of a full-fledged relationship.
An extension of a fuck friend
When visiting the West Coast, I'll get together with my on-call girlfriend for dinner & a movie and usually a night of great sex.
Someone who is only with someone else for their money, popularity, or good reputation. They dump the person as soon as things start looking bad for the person.
someone you hook up with but only ever see during nighttime hours. like a booty call or a fuck buddy but more consistent and/or monogamous. not quite dating-level.
X: i've been hooking up with Y for months now but we only spend time together at night. i've never even seen him/her during the day!
Z: sounds like you have a vampire boyfriend/girlfriend
a boy/girl who you have feelings for and he/she has feelings for you and you both know it. You might even go on dates, but for some reason you are notofficiallyboyfriend and girlfriend.