The act of ejaculating into or onto a sock after masturbation causing the sock to turn white in the area that has absorbed the semen and causing the sock to become stiff. Best to hide the sock at the bottom of the laundry so no bystanders stumble upon the sock and the ways it is being abused.
Bill: Dude did you know john has been bleaching socks?
Jake: What the fuck! that's gross shit! I wore his socks last week!
Bill: haha you probably have john semen foot, i would get that checked out.
Jake: Fuck you! i'm going to hit john so fucking hard!