Do i have to thaw out hamburger meat before cooking it if it is frozen?

Judging by your last question, I'm going to go ahead and ume that you'll be cooking the hamburger meat in the crock pot? You'll be fine if you throw in a chunk of frozen hamburger meat as long as you're planning on cooking it for most of the day. Stirring it half way through will help too... What are you making, by the way?