Often added to the end of something to signify 'to a great degree'.
Dude, he was drunk something fierce last night.
This meat stinks something fierce, throw it out!
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in a harsh and pronounced way, severely
If you don't put on sunscreen before going outside bare chested, you'll get sunburned something fierce.
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To piss very rapidly and for a great length of time. Often times the piss produces a strong piss shiver and the piss may be of an abnormal color. The shiver may make your balls tingle.
Damn fool, I've gotta piss up something fierce fool.
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