Nabber's cry

• "Yup, understood!"
• "Tricked you!"
• "I see"
• Nitpicker's cry
• Helped yourself to tea? Caught you!
• Trapper's cry when cuppa arrived?
• 'You fell for it!'

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
interjection EXAMPLES FROM OTHER ENTRIES ▪ Gotcha , Katie! Now I'm gonna tickle you!

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
by 1913, colloquial pronunciation of "(I have) got you."

Wiktionary Word definitions in Wiktionary
Etymology 1 contraction 1 (context colloquial English) Got you; have you; as in capture or apprehend. 2 (context colloquial English) understand; comprehend. 3 (context colloquial English) Got you covered, got your back; when you have an advantage or responsibility ...