I have lived a super embarrassing life, so I'm just going to list a bunch of them for you:
Pretending I was actually from America (I'm British) and speaking with an accent for a week.
Forcing my friends to call me my "goth" name.
Pretending to talk to people on my cell in public places.
Made up a friend so I would seem popular, when asked for his name I couldn't come up with anything.
Had a boyfriend cheat on me, went to his place drunk and begged him to take me back, vomited all over the train on the way home in front of a bunch of strangers. I got smashed and threw up in public MANY times.
I used to pretend I was a stripper to get people to buy me drinks.
Played hooky, had nobody to hang out with, walked around the neighborhood by myself all day, was seen by some friends of a friend, made up a story about how I was waiting for some pot. Nobody believed it.
Smashed, hitting on some dude while my boyfriend was right next to me.
Was absolutely convinced that some friends were being mean when they introduced me to their friend "Helen". I was like, why are they calling you Helen? Why are you calling him Helen? This went on for a good ten minutes. What I thought was a boy was actually a girl with a very short haircut.
When my friend called me out in front of this really good looking dude for acting like a dick to impress said good looking dude.
Threatened to gouge a girl's eyes for being friends with my boyfriend. (This one makes me cringe so hard.)
I have so many, I'll update as I remember them.
The upside to all of this is that I'm now a sober adult, mostly normal, and my friends actually exist :)