All Parts of Speech - A word used to replace any other word.
The word "nug" can be positive or negative.
"Hey I love your shirt! It's really nug."
"OMG he's so bloody annoying... what a nug."
"Will you just nug the hell off?"
"Some nug moved in next door today."
"She's so hot... I'd do pretty much anything for a chance to nug her."