Used to express alarm, foreboding, or dismay. (interjection)
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 "uh-oh" in a sentence
"The new Treasury secretary, Timothy Geithner, is on his cell phone (uh-oh!)."
"(Referring to an artwork near his office, an ersatz noose studded with rhinestones, Gian Enzo Sperone, one of the gallery's founding partners, quipped, "I may be using that soon," at the inaugural opening -- uh-oh!)"
"I call this experience the "uh-oh" moment, a feeling athletes know well, whether male or female."