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Is it just an abbreviation for だった? Any nuance or just laziness?

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2021-07-07T06:57:43.883
87378
2021-07-07T07:12:58.413
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question
abbreviations past
Why った after a noun デコった?
デコった is the past tense of デコる, a slangy way to say "to decorate."
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2021-07-07T07:05:54.483
87379
2021-07-07T07:05:54.483
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I think it's shortened usage of "デコりやがった" or more clearly "～しやがった(の(は))",
which is strong way of saying "した" / "したの(は)", in this case the complete
sentence will be "(俺の)右腕をデコレーションしたのピンクだな!?".
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2021-07-07T07:12:58.413
87380
2021-07-07T07:12:58.413
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87378
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