|1.||19 by 19|
A goal set my teenagers to sleep with 19 different people before their 19th birthday.
Usually set by girls, and very difficult for teenage boys to do.
Also code name for a slutty college freshman.
"Dude... I need to get laid tonight!"
"Yo, you should talk to that girl, she's down for 19 by 19."
"Yea, she does look like a slut!"