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1. peroscarlate
An exaggerated reaction to something that poses no actual threat
Bush 'peroscarlated' when going after bin laden, a guy in a cave.

When someone jumps out the way of something that was never gonna hit them in the first place
2. peroscarlate
An exaggerated reaction to something that poses no threat.
A guy throws a foam brick at his mate, causing him to swear/jump/scream when there was no need to, thus he 'peroscarlated'