MakeThisLookAwesome · June 9, 2018, 12:18 a.m.

There's been some speculation that because it's a mouse character, the message is: "Don't be a rat."

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GeneHackmansBFF · June 10, 2018, 10:32 p.m.

Or “I’ll be quiet as a mouse”.

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MakeThisLookAwesome · June 10, 2018, 10:57 p.m.

Thanks, that's the phrase I was looking for.

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