Nick name for Hoshi from a k-pop group, SEVENTEEN. He's named Hoshi because his eye shape is placed 10:10 on the clock
by bEyONd The banGtan August 17, 2017

The beauty rating of your date or partner during a night of a partying. She/he is quite ugly normally, but attractive and hot after a night of drinking. (Source is from a good country song).
"After about three drinks at the party, I came to the conclusion that she was a 2 at 10, and 10 at 2."
by yes juanito yes May 19, 2014

by Longstrides1 October 4, 2017

Used to describe something you consider to be amazing, but really probably isn't. Subsequently used by those around you to make fun of you.
I saw Limitless and really liked it. I give it 10 out of 10.
10 out of 10? Really? That rating is reserved for like, Lord of the Rings!
10 out of 10? Really? That rating is reserved for like, Lord of the Rings!
by gRegorLove August 4, 2011

that time when Urban Dictionary publishers get all their definitions published so make sure you publish at 10:00-10:15.
Jack: It's 10:00! Time to upload some Urban Dictionary definitions!
15 minutes later...
Jack: OH MY GOD, ALL 10 OF MY URBAN DICTIONARY DEFINITIONS GOT PUBLISHED! LET'S GO, BABY! 10:00-10:15 IS THE WAY TO GO!
15 minutes later...
Jack: OH MY GOD, ALL 10 OF MY URBAN DICTIONARY DEFINITIONS GOT PUBLISHED! LET'S GO, BABY! 10:00-10:15 IS THE WAY TO GO!
by vashil April 5, 2020

Also known as 10 hour 10 minute. This was created by Seventeen member, Hoshi due to his eye shape. This term has been used as early 2015-2016 by the seventeen's members and even made a special time slot for their variety show (Going Seventeen).
"it's always 10:10 for going seventeen"
by Hoshi blueprint January 18, 2021

When on occasional spectacle wearer uses glasses to compensate when concentrating. Arms at 10 past, lens frame at 10 o'clock
by FishboyLells January 13, 2021
