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

-or-

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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-Negative connotation
1) The oppostie of fresh
2) Unstylish or poopy; often reffering to clothing or appearance
3) Uncool or informal; often rather unfitting into the category of awesome
4) Simply unawesome or mean; describing behavior or one's actions
"Bob has swag, he's very fresh. On the other hand, Fred is really akward and is rather crusty"

"His outfit was really crusty"

"I feel that franklin is a sort of social outcast and phariah, he's kind of crusty"

"The young man was so arrogant to other people, his actions were really crusty
by potatogirl4455 May 14, 2012

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Crusty means Sketchy or dangerous. It can mean not very well made or poorly constructed. It can also be used by saying something is not healthy.
I don't want to walk across that dock man, its pretty crusty.

(looking at the poorly constructed building)

Man: That's crusty...
by DillOlive September 30, 2011

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A term used in Philadelphia PA and Brigantine NJ. It means that something is bad. Used as an adjective. Opposite of Crispy
Man that movie was really crusty.
by CwC_Wegieman2 September 26, 2011

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adj. Being nasty, gross, unpleasent, smelly, or just ugly
Man1: Hey guys!

Man2: Ewwww! Your so crusty dude!

Man1: I showered last week!
by Mexskimo February 12, 2011

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Describes everything that is just... ew. One can be crusty when acting like an asshole or just plain dumb.
EW! That teacher is so crusty for giving us that test!
by nickiminajssazz December 26, 2010

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being really, really, extremely bad at something (specifically FIFA world cup)
Im gonna beat your crusty self at FIFA this weekend
by catmeow76 November 18, 2010

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1. Skin literally peeling off, rough skin.
2. Being extremely butt weak
3. Nasty or ugly
1. Damn Eric, you are hella crusty! Put on some lotion
2. Luis has a very crusty knee
3. That Twilight book is really crusty.
by R. Devecchi March 23, 2009

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