This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Simple past tense and past participle of blatter.

"He was walking in the classic manner of the daytime drunk, with his feet planted far apart as if to brace himself against the swell of the pavement, a grin on his face proclaiming: "I'm blattered, but I'm getting away with it.""