betcha
 /ˈbetʃə/
  /ˈbetʃə/
(informal, non-standard)Idioms - a way of saying or writing ‘I bet you’ in informal speech - Betcha didn't know that!
 
Idioms 
you betcha 
- (informal) used to say ‘yes’ when you are very enthusiastic about something- ‘Are you going to the game this weekend?’ ‘You betcha!’