Pretty much anything you want. You can insert that word anywhere. Just depends on how you feel (made by swaggydub) or you can switch aroundthe word to nastyash.
"Yo you seen that girl last night?"
"Yes bruh, her ass was on point."
"Nigga she had a nastyash."
"Dude, I went to a party last night and it was gettin jack!"
"You lyin, that party was ashnasty"
"Tf that means?"
"Shut yo nastyash up nigga"
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.