Hype person that stays the longest and goes the hardest at any social gathering. Always the last to leave, and has the most energy. Last person on the dance floor/ last person standing.
I feel bad for Kent, his wife Jenny is still dancing and all of his friends left an hour ago. She is such a closer that he never has a chance of leaving early when they go out together.
Context: relationships. The person who get its right with your dream guy or girl after you break up with them because you didn't think they were worth it. The closer finishes what you started, but with loyalty, integrity, and consistency you couldn't muster. The closer acts as a catalyst to your ex find their inner strength, causing them to shine brighter and stronger than you ever could. Usually with regard to the one that got way.
Matt: Hey Dick, are you and Jenny will get back together? I saw her the other day, and she looks freaking amazing!
Dick: no, dude, she's with Ian now, and won't even take my calls. That dude's a closer. I don't have a chance.
Waiting until closer to the time of the event to make an decision.
I guess we can't play Apex tonight. Wait let's "play it closer" before we say that.
icing on the cake, finishing touches, that little extra love.
Those girl's j-lo booties was a Curtain Closers.