(BSOD) The infamous white-on-blue text screen which appears when microsoft windows crashes. BSOD is mostly seen on the 16-bit systems such as windows 3.1, but also on windows 95 and apparently even under windows nt 4. It is most likely to be caused by a gpf, although Windows 95 can do it if you've removed a required cd-rom from the drive. It is often impossible to recover cleanly from a BSOD.

The acronym BSOD is sometimes used as a verb, e.g. "windoze just keeps BSODing on me today".