The things kids say

My neighbor had Logan over for a little while to play with her daughter. She told me that she asked Logan what his primary part was. He turned to her and said he didn't want to say it. He had a sly look on his face so she asked again. He said it had to do with school. So she continued to pry it out of him. He turned to her and said, "It is Heavenly Father please forgive me for sluffing school." She said she laughed until it hurt. I talked about it at dinner last night and Natalie and Preston both said, "What does sluffing mean." Where does he come up with these thoughts?