Adjective used to decribe old people,a gross unidentified substance, anything broken, dirty, crumby, badly made/conceived, falling apart, stupid, wierd, gross, this word can be used very freely as it goes with anything that may have to do with the word crust but it never describes anything good.
1: that old man keeps staring at me
2: eww look how crusty he is

-or-

1: i just got this from the dollar store and the lid wont close on it
2: here let me try... damn its not working it sooo crusty
1:that whole dollar store is crusty

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1:Mr Tawil thinks he can teach us history by giving us a whole bunch of crosswords, he is such a crust.
2:Yea, he smell like weed, cigarettes and bagels, he is such a crusty old man.

-or-
1:ew look at the crust under this desk
2: that's gum , you dumbass
by Naomiiiiii January 16, 2007

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crusty's come's from the ass crack the stick to ya jocks.
doing a sloppy fart and it becomes hard and u have stained jocks and it dont feel good.
by SaiNt_SaRaCeN November 16, 2003

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Usually describes a person,place or thing that appears to be in either bad shape or form.
Did you see that girl's lips they were so crusty

that house we visited was extremly Crusty

What a Crusty piece of bread
by Neekay May 05, 2007

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To place a bare ass, in an unsuspecting persons face and farting.
Dat splatter on T-bones face is from a crusty, Dogg!
Fo shizzel my nizzel krizzle drizzle!
by Bang'n September 13, 2005

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someone who played one year of freshman basketball, then stopped playing and even though he sucked, his presence was missed; someone who throws sissy punches
Joe: you're a crusty butt-fuck
John: shut up *punch*
by the master of words May 17, 2006

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something or someone that is cool, hip, etc.
Angel is one crusty vato!
by Alaab April 13, 2008

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a guy who is crusty. someone who is dirty looking, someone that you would not talk to.
"unh uhh girl that boy is crusty. i just wanna hit him with some body spray."
by litwiinka December 28, 2007

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the gunk that forms in the corners of your lips after drinking a bottle of gatorade
No one said anything, so Billy played the whole game with red crusties on his face
by footballfiend5 February 07, 2009

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