Used to indicate understanding or to signal the fact of having caught or defeated another.(interjection)
A game or endeavor in which one party seeks to catch another out, as in a mistake or lie.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "gotcha" in a sentence
"Besides, the term "gotcha question" is so out of fashion."
"Some people are criticizing last night's presidential debate, including Barack Obama, who likened it to what he calls gotcha games."
"The governor supporters say that's partly because she's been a victim of what they call gotcha journalism, and they say working class voters are firmly behind her regardless."