Top Definition
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.
লিখেছেন- Cole 15 de জানুয়ারি de 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.
লিখেছেন- hotgreen14 3 de জুলাই de 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.
লিখেছেন- DPKids 11 de অগাস্ট de 2009

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When upper year collage students have a competition to have sex with 15 freshman girls in a specified amount of time, this could be one night, or one week. The one who reaches the goal, or sleeps with the most about of girls in that specified amount of time, will have bragging rights.
Jenny: "Hey, here's some advice. A lot of guys are doing the freshman 15 this year, so don't get to drunk at that part tonight."
লিখেছেন- Jay kay 31 de মার্চ de 2013

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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"
লিখেছেন- CrystalMETH 6969 16 de ডিসেম্বার de 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
লিখেছেন- Kitie Write 13 de ফেব্রুয়ারি de 2010

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