Hi,
Welcome to the Forum.
What does this sentencemean
Could you tell me the meaning of a word"outcha" and the usage?
'outcha' is not a word. It seems to be a phonetic representation of 'out of your', ie the correct spelling would be "You are out of your mind." This means 'You are crazy'.
However, I've never heard people use that pronunciation. More normal pronunciation would sound like 'Yer outayer mind'.
Best wishes, Clive