Top definition
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!"
by Brucey69 November 29, 2009
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