Noun: See crunchy and salty in regards to the second definition.
Definition one- A delicious snack consisting of thinly sliced potatos, oil, and salt, cooked to a crisp, and enjoyed by fat Americans everywhere.
Definition two- A person who is both salty and crunchy. They have a feeling of discontent or otherwise, and feel as though they have done too much cocaine.
"Dude John is such a potato chip. I can't even handle him right now"
Adjective: An alternative definition to the general understanding of the term. Anyone who has done an excess amount of cocaine resulting in their feeling like an old crunchy paper bag. Usually at a music festival. For elaboration see "potato chip"
"Hey man want to go check out the next band?"
"I don't know dude I'm feeling kind of....crunchy. I think I did too much blow."