In Girl World, Halloween is the one night a year when a girl can dress like a total slut and no other girls can say anything about it.
8 seconds sound clip from the Mean Girls (2004) movie soundboard.
You can hear this line at 00:25:24 in the Blu-ray version of the movie.
Quote context
[...]
- You staying for the Mathletes meeting?
- Okay, I lied, but I had to go home and work on my costume.
- In the regular world, Halloween is when children dress up in costumes and beg for candy.
- The hard-core girls just wear lingerie and some form of animal ears.
- Doesn't she look great, honey?
[...]