Simple past tense and past participle of brainwash.(verb)
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Use "brainwashed" in a sentence
""That's more insensitive -- that's more insulting to me than me using a term 'brainwashed,'" he said."
"You do realize that the reason you are so gullible and easily brainwashed is that you are STUPID dont you?"
"It was the maximum sentence allowed under Kansas law. you are just a pathetic little pea-brain brainwashed coward. went you get to the pearly gates St. Peter will be there giving you the moon and point to the highway to hell."