The crust that remains of ya fingers after you chow down on some fire grub
*Harold eats a bag of flaming hot Cheetos*
Guy: damn girl yo hands red af!
Harold: I has been eatin the Cheetos. I got mad lunch hands
when someone just ate their nasty/greasy/smelly/messy lunch and then proceeds to touch your hair, shake your hand or touch you in another way so as to wipe all the nasty crap they have on their hands on you. sometimes people do this by accident, but most likely not.
shana comes and starts touching diana's hair.
diana: hey wtf?
shana: what?
diana: your shitty lunch hands are touching my hair.
shana: oh sorry. fml.