Clipped whites -- also referred to as "blow-out" highlights (whites that appear blown out) -- are the loss of details due to the luminance signal resulting from overexposure being cut off by the video system in order to prevent exceeding its limits. Whites that turn a grayish color or pink mark may be clipped and overexposed. Overexposure creates an image that looks washed out or all white.
A photograph may be described as underexposed when it has a loss of shadow detail, that is: when important dark areas are "muddy" or indistinguishable from black, known as "blocked-up shadows" (or sometimes "crushed shadows", "crushed blacks", or "clipped blacks", especially in video). As the adjacent image shows, these terms are technical ones rather than artistic judgments; an overexposed or underexposed image may be "correct" in the sense that it provides the effect that the photographer intended. Exposure_compensation|Intentionally over-or under- exposing (relative to a standard or the camera's automatic exposure) is casually referred to as "exposing to the right" or "exposing to the left" respectively, as these shift the histogram of the image to the right or left.