The pasty pallor a person gets when a wave of nausea hits them characterized by paleness in the cheeks and lips, half lidded eyes, and lethargy. Often associated with overindulgence and pre-puke drools. Can also be used to describe motion sickness as in sea sickness or car sickness.
dude 1: Ughhh, I shouldn't have shot all those jagermeisters.
dude 2: Yeah but that fifth of wild turkey didn't help. You're definitely green around the gills
dude 1: Ohhh gawd I'm gonna hurl!