You Gotta F your F

Gretchen coming up from the downstairs:"Mom, Micah has to F her F!" Surprised at her offensive, yet innocent language I fearingly asked: "What does F your F mean?" Gretchen: "Face your Fears, F your F!" She then proceeds to talk and explain in her fast pace usual way:"She is SO scared to go down into the basement that I thought she should just go, F her F. This way she won't be scared anymore and she'll go down by herself. But SHE won't. She'll never F her F. " sigh. Me: sigh