An old sock filled with so much dried semen it has become crusty, mainly found in teenage boys rooms.
Also might be filled with lotion
"Yo dude, while you were in the bathroom, I uh... um, found a crusty sock in your drawer"
"Shit I forgot about that!
by iheartthecregg September 22, 2020
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A white sock extracted from an adolescent boy's dresser to indulge the young lad's fantasy of having his meat in a sleeve during a spanking session and having that sleeve double as a receptacle and wipe at the end of the spank.

Often used over and over and carefully stashed for privacy, the Crusty Sock crystallizes over time and literally "stands on its own." It is typically at this point that a new Sock is put into commission and the old one is retired.

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Once Mom and Dad fell asleep, young Micah pulled out his stack of Porno Mags and spanked his monkey, cleverly containing the evidence within the confines of his trusty, Crusty Sock.
by Alfsonso Muzan November 10, 2010
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when you masterbate in your socks and they get crusty.
Mom: why don't you where those socks
Me: no, there crusty socks
by no name from me ooo December 18, 2018
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A crusty fucking bitch who has bad breath and likes to be pissed on. Slightly into fingers in the bum and he has a wee lil dick. No homo
by 420ur69mum April 10, 2017
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When you jerk off into a sock but the bust is so big your sock gets completely coated and becomes crusty. Depending on the bust the sock could become crusty enough to snap like a twig.
Jared: Damn my crusty socks! Another one got crusty enough and snapped!
Dylan: Awwww dude, got a case of crusty sock syndrome? R.I.P.
Jared: Yeah dude, I saved up for like a week and had some high quality porn.
by Dem_Bois January 29, 2018
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One day I was walking in my apartment with new cute socks on. I didn't see there was a water bucket right in front of me, I was daydreaming about my new socks when all of a sudden... I stepped in the bucket and fell! My socks were now wet and I was so upset! I absolutely HATE the feeling of a wet sock and wanted to use my new sock so bad. I thought I would grab a Hair Dryer to dry my sock, but I realized I didn't have a Hair Dryer!!! I was so upset that I just thought of one solution... I grabbed a pan and put it in the oven, then I grabbed my wet sock and put it in the pan. After a while, I saw that my sock was looking weird... I turned off the oven and grabbed my sock and my sock WAS CRUSTY and still wet... Moral of the story, don't step in a bucket full of water with socks on.
Isabella: Omg did you see Bia's Wet Crusty Sock?
Neya: Yeah I can't believe she has a Wet Crusty Sock..
by Bia the Baddie February 12, 2021
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When your brother Bret whacks his pecker in your black nike sock then leaves it in your room for you to see
I found a crusty jizz sock under bret’s Bed
by Chris Fleming September 16, 2019
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