O RLY? is an Internet phenomenon, typically presented as an image macro featuring a snowy owl. The phrase "O RLY?", an abbreviated form of "Oh, really?", is popularly used in Internet forums in a sarcastic manner, often in response to an obvious, predictable, or blatantly false statement. Similar owl image macros followed the original to present different views, including images with the phrases "YA RLY", "NO WAI!!", and NO RLY.

An image macro is a piece of digital media featuring a picture, or artwork, with some form of text superimposed. The text frequently appears at the top and bottom of the image. Image macros were one of the most common forms of internet memes in the 2000s, and often featured witty messages or catchphrases, although not all image macros are necessarily humorous. LOLcats, which are images of expressive cats coupled with texts, are considered to be the first notable occurrence of image macros. Advice animal image macros, also referred to as stock-character macros, are also highly associated with the image macro template.