A phrase one uses when marking the end of something.
Sarah:I can't believe Amy cheated on you.
Tom:I know, me neither.
Sarah:What did you say to her?
Tom:I told her "thanks for the game", packed my stuff, and left.

When Robert started talking smack, and getting on everyone's nerves they told him "Thanks for the game Robo".

by Go Ninja, Go Ninja, GO! January 19, 2007
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A statement of frustration when it's a video game's mechanics and random number generators and not the player's own abilities that make a situation frustrating.
"Thanks Game for not having checkpoints in the middle of a LONG BOSS RUSH!" Table Flip ensues.
by TheGoodWario March 31, 2020
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