An exclamation of shock, surprise or annoyance. Essentially, it is used similarly to the phrase "oh my god."
Person1: Arguarf! This corndog tastes like a unicorn farted on it!
Person2: Is that a good thing or a bad thing?
Person1: It's a good thing you fucking dumbass.
Person2: Is that a good thing or a bad thing?
Person1: It's a good thing you fucking dumbass.
by Brock O'Coffee XXIV December 04, 2017
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