When a first year college student (usually a female) eats a ton, and precedes to sit on her ass and gain 15 lbs.
Did you see Suzy back at Christmas? Talk about freshman 15.
by Cole January 15, 2004
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Another name for the college freshman class; given to the freshman class because in the first year of college, students will usually eat more than usual and not exercise as much, thus gaining weight (usually about 15 pounds)
Sophmore: I just joined the gym... I have to try to work off the Freshman 15.
by hotgreen14 July 03, 2009
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When a first year college student comes back the following year and appears to have gained about 15 pounds from eating too much and not enough exercise.
Did you see Ashley and her new fatass? She went through Freshman 15.
by DPKids August 11, 2009
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When a girl that is kind of a slut but never puts out, goes to college and has sex with fifteen guys right off the bat.
" I thought Lindsay would be alright in college until I heard she did her freshman 15....... what a shame"
by CrystalMETH 6969 December 16, 2011
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When a freshman guy or girl has sex with 15 people during their freshman year.
Sally: Yeah, ive already had my freshman 15
Dee: You mean you gained 15 pounds?
Sally: No i mean ive done 15 guys
Dee: Oh. Youre done
by Kitie Write February 13, 2010
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When a man attempts to have intercourse with 15 college freshman in one night. The guy who completes this great challenge of endurance and skills with the ladies. Is crowned king of the night.
"Hey Alec have you completed the freshman 15"

"Nah man I can't even get one"
"Well you better keep trying Grants already on number five"
by Youknowwhothisisjamed September 19, 2017
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when freshmen in college gain 15 pounds because they drink every day of the week and have no self control whatsoever.
Do you wanna come drinking with me and the girls tonight?

.. It’s a Tuesday night.. I’m also not trying to gain the freshman 15.
by TheEmployee August 22, 2020
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