A software development term describing the act of shoving large amounts of code at people where it isn't wanted. Often used in reference to large, untested, and/or unnecessary patches or commits to open source projects. Originally coined by Zed Shaw on website for the Mongrel web server. A reference to fisting.
"Dude, what's up with that thousand-line, no-tests commit you made? What the hell does it even do? It broke the build a week ago and you still haven't fixed it. Stop code fisting..."