David: Hey bro, do you smell that?
John: Yeah.
(Both boys look to the side.)
David: UGH! She is crusty.
John: Yeah.
(Both boys look to the side.)
David: UGH! She is crusty.
by Tough lips June 3, 2016

those flakes that are forgotten by the toilet paper and they itch (Poor Hygiene) Morbidly obese people are prone to this (they cant reach)
Logan's nurse came over to give him his sponge bath and exclaimed "You've done it again Logan You've left me a crusty surprise!"
by Flying dutchman July 2, 2015

When you're simply too lazy or poor to get more tissue so you pick up some old crusty tissue out the bin to blow your nose on so you don't have to move or buy tissue.
"Hey man you still got that cold?"
"Yeah, I was so tired I had to Crusty Blowback I couldn't be bothered to get more tissue "
OR
"Fuck man I just had a wank and I had nothing to clean with so I had to Crusty Blowback!"
"Yeah, I was so tired I had to Crusty Blowback I couldn't be bothered to get more tissue "
OR
"Fuck man I just had a wank and I had nothing to clean with so I had to Crusty Blowback!"
by Queen Noodle October 3, 2017

John; Did you hook up with that chick last night?
Dave; yeah man, I blew my load right in her face, and gave her a Crusty Ray Charles.
Dave; yeah man, I blew my load right in her face, and gave her a Crusty Ray Charles.
by Fishlipss May 11, 2014

by Jazz418 February 9, 2021

Used to describe someone or something that is generally bad or unattractive. Can also be used as just a noun("crust"). If you wish to use crusty in a neutral way, say "crunchy"--- for a good way say "crispy". Use crusty with rhyming words to emphasize a point.
"OMG this ugly hoe just cut in front of me in the McDonalds line... crustyyyyyy. "
"Boi, get you and yo crusty, dusty, musty Crocs outta here!"
"Boi, get you and yo crusty, dusty, musty Crocs outta here!"
by whyevenFightme March 20, 2016
