Simple past tense and past participle of slouch.(verb)
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Use "slouched" in a sentence
"It looked like he had his left hand on the wheel and he was kind of slouched over."
"She was kind of slouched and seemed to be enjoying herself, perhaps laughing at the event and the pretension of it all."
"We got to the gas station, where Officer Cupcake drove around the corner of the place and kind of slouched in his seat, while I went in to get money."