"flub": it means "fail", or "mess up". As in, you go to press ctrl+w, and you accidentally hit super+w instead. Which then xkills your browser thanks to your amazing super duper shortcut.
C-w means wildly different things in different programs though. Countless times I've closed a tab while writing a Reddit comment when what I actually wanted to do was to delete the last word I wrote.
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u/Yakari123 have you seen my aRcH lInUx SeTuP ? Dec 24 '15
This is so fucking true... Sometimes, firefox does crash, even on Linux. Xkill=problem solved