look up any word, like blumpkin:
 
1.
unnaturally pale and yellowish
A sallow piece of string...
by Kelly Dowhower October 19, 2003
 
2.
A person with a yellowish or yellow-based, pale, and possibly unhealthy looking complexion. Skin which lacks radiance, or doesn't "glow".
Jasmine's complexion looked sallow after she spent two-weeks cooped up inside.
by MMee September 18, 2013