sweet patootie 

The expression has currently come to be used in refering to a person's rear end, but was originally a term of endearment. It evolved from "sweetheart" to "sweet potato", to "sweet patootie".

She's my little sweet patootie.

sweet patootie by R. Fullerton March 11, 2007

sweet patootie pie 

Pie that mama made last year. Slang for sweet potatoe.

You think mama can make me some sweet patootie pie like she made for me last year? I don't know she might!

sweet patootie pie by Holla1041 January 6, 2017

You bet your sweet patootie 

It means the same as the phrases, "you bet your ass" and, "you bet your dick and balls".
That is, you're absolutely, positively, 100% certain about the final outcome of a situation.

{Seen on a website about flashlights, LEDs, and lasers}:
I tried to cut through the outer casing to bare metal with the blade of a Swiss army knife, and with some minor difficulty, I was able to do so. This shows the unit has a Type II anodized finish to it (...)
Would I really cut up a brand spanken new $450.00 laser? You bet your sweet patootie I would, if it's in the name of science.

You bet your sweet patootie by Telephony May 30, 2015