‘Move fast and break things’ is a development mantra popularised by Facebook and picked up with enthusiasm by software development teams both small and large. The idea is that if you aren’t breaking things you’re delivering value too slowly.

Why 'Move Fast and Break Things' Doesn’t Work, capacitas Insights (also in the Internet Archive)

mov is of course an 8086 instruction, and mak is a script name for build scripts that I tend to use, most intricately to build lDebug.