freshman fifteen 

the phenomenon to put on 15 pounds in your freshman year.

To avoid the Freshman fifteen, you must exercise regularly.

freshman fifteen by Bebel May 23, 2006

freshmen fifteen 

a compiled list of fifteen of the hottest freshmen in a college or university. usually contains at least one transsexual

dude 1: damn, i just saw number 7 on the freshmen fifteen, shes smoking!
dude 2: you dumbass shes a transsexual
dude 1: oh SHIT

freshmen fifteen by lolcow4342 November 1, 2009

the fleshman fifteen 

Those participating in a fraternity initiation weekend must go unnoticed all night long while successfully ejaculating on fifteen unsuspecting freshman. Parameters are that all ejaculations must go on within the frat house within a 48 hour span. The penalty for being caught is getting a lapdance from a transvestite stripper until it results in ejaculation.

Ayy brodie you going to Beta house tonight? I heard Brad is attempting the fleshman fifteen tonight?

the fleshman fifteen by rectalreloader September 7, 2018

froshman negative fifteen 

for those girls of beauty and wonder who appear to eat a lot at times, but magically never gain a pound. frequenting the gym often in colourful tanktops and "planking" to la roux with the occasional "dead muscle," they find themselves pushing each other harder than they ever did in high school, so clubbing together in the summers will not only be enjoyable, but also rewarding.

Fat chick: man that girl got a froshman negative fifteen. i wish i could have her determination.

froshman negative fifteen by skinny-bitch January 26, 2011