- You're dern tootin'!
- You're dern tootin'!Rur. You are absolutely right! (Never the full form
tooting
.) •Tom: Are you really going to take up boxing? Bob: You're dern tootin'!
•Father: Do you really want to buy that droopy-looking puppy? Bill: You're dern tootin'!
Dictionary of American idioms. 2013.