Boosted by jsonstein@masto.deoan.org ("Jeff Sonstein"):
jargon_bot ("Jeff’s JargonBot") wrote:
Beep. Boop. That's bot for 'I found something you should know': 'whack' — According to arch-hacker James Gosling (designer of NeWS, GOSMACS and Java), to "...modify a program with no idea whatsoever how it works." (See whacker.) It is actually possible to do this in nontrivial circumstances if the change is small and well-defined and you are very good at glarking things from context.
http://www.catb.org/jargon/html/W/whack.html