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1. without interest, vigor, or determination for wearing pants; listless; lethargic: a slacksadaisical attempt.

2. lazy; pants-less: a slacksadaisical fellow.
1. Shaggy didn't put on pants before we came over, I guess he was feeling a little slacksadaisical.

2. Shaggy slacksadaisically forgot to put on pants before work.
by The Real Shaggy Wilcox June 26, 2011
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(Adj) Describing someone who wears a dress solely because they are too lazy to put on pants
"Jane looks so nice today, did you see her sundress"
"She didn't try, she's just slacksadaisical"
by ✌🏻️ July 13, 2015
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