(You're) an aphorist! - Oh yeah, I've always had ample proportions!
Quoth:
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GP: Yep! I nailed his ass!
Marylin: I thought he'd outgrown trains ...
GP: They never grow up, lady. They just get tubby.
M: How charming! An aphorist!
GP: Oh yeah, I've always had ample proportions, but believe-you-me: it's all muscle. It's hard as a rock! I'm not one of these cream-puff-sittin'-behind-the-desk-private-dicks. I'm an ass-nailer!
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Ass-nailer Gus Petch seems to misunderstand the term "aphorist" here, but what is the term he seems to be thinking of?
Thanks.