A combination of the words "
gross" and "
nasty", it is an adjective that goes above and beyond both terms. Can be applied to the hygene of an individual, food products, or any other situation where such a description is necessary.
Very similar to how "fugly" describes
something exceedingly unattractive, using a combination of two words.
Jake: When I came in just now, I smelled the nastiest stench as I walked into our apartment. It was like a combination of Febreeze, ramen
noodles, some other food and
dust.
Jared: Let me smell it to see if I can find out what it is.
*
sniff*
Jared: Oh man, that is just grossty.