"Your" (means you own it) and "You're" (you are).

If there is an apostrophe in a word, chances are there's a letter missing - it's a contraction. Apostrophes are a hint...

I remember my grandmother saying "warsh" for "wash" all her life. She was born in Washington State and lived there til she was a teen. I have some friends born and raised there that say the same thing. Dialect, I guess.