A phrase originating from the video game Left 4 Dead that is to perform an action or say something that instantly transforms your good woman (wifey) from herself to a raving, dangerous banshee.
Jon: Lisa's freaking out man! I don't know what to do!

Pat: What did you do?

Jon: All I said was that I needed a little space.

Pat: Saying shit like that will ALWAYS startle the witch.
by undecided1 January 1, 2009
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To drastically fail at some task or activity. syn. screw the pooch, shit the bed
Bill: My cake turned out terrible!

Lisa: Yeah, you really startled the witch on that one.
by Kodiak1985 February 20, 2009
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