Fuckin Cheater(s)
An appropriate response anytime someone (or a group of someones) intentionally leaves you out of a situation or goes out of their way to diss you.
Friends: We all took a shot while you were in the bathroom
Me: Fuckin Cheaters!
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Friend: I stole your game of pool when you weren't looking.
Me: Fuckin Cheater!
Me: Fuckin Cheaters!
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Friend: I stole your game of pool when you weren't looking.
Me: Fuckin Cheater!