When bad programming (or a bad compiler/loader) causes a computer to 'write' data over a portion of memory that it later thinks is programming instructions in machine code, it will end up doing unpredictable things, depending on that data. By extension, any action which is likely to have unpredictable, unforseen or chaotic results.

Usually heard among techies who program in assembly language or machine code.

"I wouldn't tell your wife about your one-night stand in Tulsa if I were you; that would be self-modifying code."

self-modifying code by Meles Borealis January 11, 2009

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Modify

To change, but with an extremely negative connotation to suggest the object used by this verb got severly damaged.

Say that again and I'm going to modify your face.
He modified the door.

Modify by ojjsupastyle June 12, 2006

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Modify

To change an object so as to customize its use to fit your needs, such as taking out a set of P90 pickups on a guitar and replacing them with Mini Humbuckers.

Jim: "Bruh why's your car so loud?"
Bob: "I had to modify it to sound badass!"

Modify by That_crazy_moron May 15, 2019

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