What do you consider hooking up to be?

Tal • I can’t believe I’ve had this app since I was 16. • • IG: tal.is.tired
This came up when I was speaking to my cousin a few weeks ago, and again today in my Women's Studies class and I realized how much it can vary by experience, generation, location, etc. 
So just for curiosity's sake if you would just let me know how old you are, where do you live, and most importantly; what do you consider 'hooking up' to be? 
Feel free to be as explicit as you want, I've been there, done that, seen the play ;)
Thank you!! 
❤️🌈