When a girl is on her period and she decides to wear a short skirt/dress while wearing no panties and allows the string of her tampon to hang out while she dances.
The phrase 'Tampon Girl' has been immortalized at the University of Illinois because of an incident that happened at Joe's Brewery in the early morning hours of September 14, 2008. Eye witnesses claim that they spotted a girl in a short pink dress dancing on stripper poles who revealed a tampon string hanging out of her vag. This was later posted on the University of Illinois Juicy Campus Forum. While the true identity of the Tampon Girl has never been revealed, it has been a sensation there ever since.
Brie: "OMG do you see that skank dancing on the poles?"
Angie: "OMFG it must be the return of Tampon Girl!"
Brian: "Do you want to go to Joe's Friday night?
Jake: "No, Tampon girl will be on the rag again. You should steer clear of Joe's this weekend, unless you want to bring home that slut for some fun in her poop portal."
The act of quickly minimizing a computer window when someone else enters the room because they do not want the other person to see the contents of the window, especially if one is looking at porn on their computer.
Dr Venture: "Brock, what did you just ninjamize?"
Brock: "Uhh, I didn't ninjamize anything."
*Dr Venture walks around to Brock's computer to get a look for himself*
Dr Venture: "Ohh my God Brock! more porn?"
Ryan: "Where have you been?"
Josh: "Sorry I had to ninjamize my World of Warcraft window because my mom came in my room and I'm not supposed to play right now."