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4.
The nasty hair that grows from the back hair line down your neck.

the first example wants to make me throw up.
mary: hey that kid is kinda cute
kristy: yea but look at that neck cheese
by dan latcovich March 25, 2008
 
1.
The accumulation of breast milk, formula, perspiration, shed skin cells, spit up, and saliva that gets caught in the neck creases of an infant, and creates a powerful odor (like stinky cheese). May precede or accompany intertrigo or a yeast infection.
Get a washcloth, I need to clean out baby's neck cheese.
by Ceanothus March 07, 2004
 
2.
Pungent, typically white, substance found in the folds of skin just below the chin of young infants.
What a cute baby...but that neckcheese is bringing tears to my eyes.
by Phil Barlow January 21, 2003
 
3.
the lingering odour of a fat person's neck, especially at the top of the neck. usually a horridly rank mix of dairy products and unusually high sodium content and the inability to scrub that unreachable area of the neck that plagues the obese.
john: dude, why do i smell cheetos and corn beef mixed with sadness?

matt: oh, thats just the fat kid in the corner, he just got out of gym class.

john: neck cheese...
by cristobal4680 August 01, 2011