May look disgusting sometimes, but still rocks when making fun of it.
Also good for showing your lack of respect for another person.
"You're a dick man."
"Ah touch my buttfluff, ass eyes."
b) Figuratively: Style without substance, frivolous, useless, meaningless, unintelligent, pointless, form lacking function, redundant, annoying, irritating.
That girl is hot but she's got nothing but butt fluff between her ears.