look up any word, like sex:
 
1.
The smell associated with a recently manufactured motor vehicle. The smell is usually produced by a number of plastics, glues and other treatments applied to the car during the manufacturing process of the vehicle. After a few months, the presence of the smell inside most vehicles decreases markedly thus making it a "new car smell".

Due to the presence of this smell uniquely in newly manufactured cars, there is a certain air of prestigous associated with owning a car that has a "new car smell".
Oh, I love this car, it's got a lovely new car smell. Did you purchase it recently?
by Hoody88 October 03, 2007
 
2.
The time in a newly-formed relationship where the couple is completely obsessed with eachother. The couple must spend every waking minute together and the only thing they talk about is how in love they are, how lucky they are to have found eachother etc, etc,. The new car smell usally consists of annoying texts to friends bragging about the relationship and posts on facebook that make everybody on that persons friends list want to puke and/or gouge their eyes out to spare them from the repetitive post about their "special, one of a kind love." The new car smell usually last the first few months of the relationship and on some rare ocassions can last a year or two. After the new car smell wears off the couple pull their heads out of their asses and realize that they are no more special than any other couple.

Anything that last longer than that isn't qualified as a 'new car smell', but rather said couple is putting on a insecure front, making their family and friends think they beat the odds are still so much in 'love' when really the realtionship has turned mediocre and/or boring.
Facebookuser: Love u (insert name here)! Ur my life, love, and Soulmate! Thank u so much for the surprise gift tonight! Your so sweet. Love you Boo! :)

Facebookuser: Bed is cold without my beautiful bride next to me. 45 min till i get warm. love you (insert name here).

Facebookuser: I MISS YOU (insert name here)! HOPE U HAD A GREAT DAY AT WORK. CANT WAIT TO TALK TO U ON MY LUNCH BREAK. XOXOXO IM MISSIN U LIKE CRAZY RIGHT NOW!

Friend 1: OMG- These face book posts make me want to PUKE.

Friend 2: Don't worry, it's just the new car smell. It'll wear off soon and they'll realize how big of jackasses they look like.
by KiiiMBERLY April 27, 2011
 
3.
1. when a female has a fresh (hardly used) Vagina 2. slang for a virgins vagina
Dude...when I pulled down her underwear "IT HAD THAT NEW CAR SMELL"
by SixxTwentySeven October 26, 2013