What is "image macro"

n. (context Internet English) A humorous image with superimposed text

In internet culture, an image macro is a picture superimposed with text for humorous effect. If an image macro becomes recognizable enough, it can be considered an instance (sometimes the only instance) of an associated internet meme. Image macros are usually overlaid with white Impact font bordered with a thin black outline. The use of image macros of this format was widespread from 2007 to 2011, after which the popularity declined rapidly, with very few of the original websites and sources actively sharing and creating new versions and iterations using this format as it had become "overused". The format popularised in internet culture from 2015 to present is a white area above the image (or sometimes even a video) containing a caption, originating with screenshots from the Twitter mobile application.