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1.
Someone who constantly takes a shower or is known to lounge around in their pajamas or bathrobe. Most notably in seen in lazy old army generals.
Martha: Amos, you're such a showerpants!

Amos: Now you're gonna get it. Fall in, sister! Ten hut!!!

Martha: Crazy guy. Lounging around in your pajamas and bathrobe all day. I don't know how you do it.

Amos: But I can't help it. I'm a lazy old showerpants!
by Dusty's Baby Powder October 26, 2010