"sweetheart, pretty girl," colloquial American English, 1921, perhaps a corruption of potato (c.f. sweet potato). Sweet patootie is recorded from 1919 as a generic exclamation.
双语例句
1. Ask your sweet patootie if she wants some of this pop.
问问你的女朋友想不想来点流行音乐.
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2. See? I got a perky patootie! - ve a bodacious bum. - Nutritious and booty - licious!