I can't seem to find the right term. The word here would be 'slordig'. Which is close to messy, but witho... ah, wait. Sloppy is what I'm looking for
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I don't mind sweatpants, pyjamas and morning hair (without the morning breath, please). Outside it's a bit weird to walk in pyjama's, in that case I don't mind as simple sweater and jeans or a t-shirt and jeans.
I also don't like lingerie. Keep it simple. Wear shorts, wear boxers.