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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