The act of a female entity leaning at a perpendicular angle over a flat surface, therefore exposing both the breasts (when wearing a loose shirt) as well as a clear view of the contour of the buttocks.
While wearing loose clothes, Anna greatly excited the group of boys she was talking to when leaning over the table. She was unaware that she had been 17ing, and tits were shown.
Verb- Act of showing support for the Seattle Seahawks by proudly sporting jersey's and other gear, and by displaying #12th man flags. 12ing should be done as often as possible if not all the time. If you see a fellow 12th man or woman 12ing, yell "SEA-HAWWWWKS!!!!" to show your pride. Post pictures of yourself 12ing whenever you can! GO HAWKS!
The frenzied fans of the Seahawks brought their 12th Man flag on vacation and posted a picture of themselves "12ing in Vegas" online
The Hawks fans were 12ing so hard at the game, the Whiners tries to impose noise control rules.
1. "MOM! You 9/11ed my sandwich!"
2. "Bongo keeps on pissing on the kids. He's totally the 9/11 of party clowns."
3. "I was having a great day, until Brandon started 9/11ing it."