look up any word, like swoll:
 
1.
A place where girls walk around in Roots sweat pants everyday of the week. Worn with ugg boots & construction socks. Oh and don't forget to have hair that goes down to your ass. Gatta love Thornhill girls!
Hi, I'm from Thornhill and I only wear Roots pants.
by Nicdee January 15, 2011
 
2.
A suburb of Toronto, Ontario. Largely populated by Jews and Chinese. Good place to grow up, but once you hit your teens there is really nothing to do but go to the Promenade, and smoke weed in the parks. Most of the police have dicks up their ass, so don't get your stoner ass caught.
Guy: Bro, its Saturday night, what are we gunna do?
Friend: We live in Thornhill man, and I heard nobody is reaching the mall... let's just go meet up with the stoners at the park and smoke some kush.
by fuzzybluelights December 05, 2010
 
3.
Thornhill is a former village in Ontario, Canada, directly north of Toronto, and is currently shared by two municipalities, the city of Vaughan having the portion west of Yonge Street and the town of Markham having the eastern portion. It was founded in 1794, and has a large population of Jewish people.
Promenade Mall is located in Thornhill.
by Gennnn January 02, 2006
 
4.
1. A town that is full of immigrants. Usually the town is full of smelly Persians or chinks (retard Chinese people).

2. A town of full of ignorant police who have no life and spend there time on petty useless crimes. Ya lets go york region useless police.
Yo that town is so Thornhill. Is full of fobs.
by Duncan Donuts March 30, 2010
 
5.
To interject yourself into a private conversation between two other people who were not talking to you and one up their story.
Two people privately talking about something.

A third person not involed interrupts and tells a similar situation but how theirs was better.

"Did you just thornhill our conversation?
by dizzlvizzl August 18, 2014