Not a phrase that my grandmother said, but one I said to her.
"Hey, Granny. I have a doozy for you."
Backstory:
My grandmother took pride in her Scrabble prowess. I spent a lot of summers growing up with her and she would always play cards, dominoes, or Scrabble with friends. She taught me, my siblings, and cousins all how to play. Thing is that she never took it easy on us, so we always got our butts handed to us when playing her.
Anyhow, I was in my mid 20s at the time and my grandmother was on the verge of beating me by 50 or so points. I was like whatever until I noticed something on the board. I looked at her, looked at the board, and looked at her again. I glared squarely in her eyes and said, "Granny, I have a doozy for you." Then I proceeded to put my tiles on the board with the word "doozy" landing on a triple word score and the "z" landing on a double letter score. An instant 84 points I think it was.
The way she looked at me was priceless.
She looked at me like I stood up on the table, squatted, and took a dump on the board. I blew her butt out the water. She was not pleased. The funny thing was that she had the nerve to challenge the spelling on the off chance that it was "doozie" (which is an alternate spelling), so she lost her next turn on top of everything.
We never played again, but she was willing to take the joke in hand whenever I mentioned it... which was often. A year or so after that she passed after a couple of strokes.
Sorry if this is tldr. I tell this story once every few years or so to a friend, not for them, but to remind myself of her cause I really miss her A LOT. I haven't told anyone in a while.
So basically whenever I hear the word "doozy" in a sentence, I think of her and smile.