On blogs and Internet discussion forums, when participants use the SGML-style tags popularized by HTML (or sometimes BBCode-style tags) to accentuate their messages.
For example [[SarcasmMode
Sometimes these tags can include attributes such as
Oftentimes the opening tag will be omitted and only the closing tag will be there, as a kind of self-conscious [[LampshadeHanging lampshade hung]] on the preceding flame/rant/etc.
Can also be used in [[ImageMacro image macros]]. Note that not all edited photos are image macros: Some humorous pictures are seen on the 'Net, such as a man with " " tatooed on his neck or a tombstone with "".
Anti-war candidate Darcy Burner wore a T-shirt with on it in several photos.
[[Series/MythBusters Adam Savage]] frequently wears a T-shirt that states
is occasionally used on Usenet to indicate that one is unsubscribing from a thread. However, the proper use should be either (to indicate that the subscription is ending) or
This used to be done with faux C preprocessor directives, e.g.:
---> #ifdef FLAME
---> [[FlameWar flame flame flame]]
but that usage has largely been supplanted by more-approachable HTML.
Also known as [[http://www.cfcl.com/rdm/carny/2001.02.html Ostensible Markup Language]], although it's not the only meaning of that phrase.