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1.
In the words of sean hunter from boy meets world.

The Scent : When you have a girlfriend/boyfriend and all the girls/guys want you now.
EX 1 : Kelly and Michael : i love you, i love you too baby
Jack behind a bush : i sooo want her now.
EX 2 : Jim : Hi Tina!
Tina : *cold shoulder*
Jim : Hi Daisy!
Daisy : *cold shoulder*
***THE NEXT DAY***
Jim and Samantha : I love you so much baby. i love you too! i love you as my boyfrined!
Tina :Hey Jim
Daisy :Hi Jim!
Mrs.Tallman : Why hello jimmy boy.
Jim : Hey john why do they all like me now?
John : DUDE! YOU GOT THE SCENT NOW!

by Thewhite boy from cali February 28, 2007
 
2.
If you have experienced a dry-spell in the lady department and get laid unexpectedly, you now have "the scent."

The scent is the confidence achieved from that hookup. You have to take advantage of this confidence booster and find another girl before it wears off, usually two weeks later. If you do land another girl, the scent can keep paying forward.
Nick: I hadn't been laid in 6 months, but last night I got drunk and hooked up with a girl.

Robbie: Oh shit, dude, you better go out on the town every night while you still have the scent or it will be another 6 months for you!
by Metrosexuwell April 28, 2009