A celesbian in its original meaning, simply means a female celebrity

Celebrity

A celebrity, also referred to as a celeb in popular culture, is a person who has a prominent profile and commands a great degree of public fascination and influence in day-to-day media...

 who is known or alleged to be a lesbian

Lesbian

Lesbian is a term most widely used in the English language to describe sexual and romantic desire between females. The word may be used as a noun, to refer to women who identify themselves or who are characterized by others as having the primary attribute of female homosexuality, or as an...

. In modern-day mass media

Mass media

Mass media refers collectively to all media technologies which are intended to reach a large audience via mass communication. Broadcast media transmit their information electronically and comprise of television, film and radio, movies, CDs, DVDs and some other gadgets like cameras or video consoles...

 however, the term has come to mean a female celebrity who claims to be a lesbian, whether explicitly or implicitly, typically as a publicity stunt

Publicity stunt

A publicity stunt is a planned event designed to attract the public's attention to the event's organizers or their cause. Publicity stunts can be professionally organized or set up by amateurs...

, even though she may or may not be homosexual in real life.

A similar term to a celesbian (in the latter sense) is a fauxmosexual (a portmanteau of faux and homosexual), in which case the celebrity concerned may be male or female.

Celesbianism as a Western media phenomenon came in vogue during 2008, with a number of female celebrities allegedly presenting themselves with a lesbian image. Some LGBT

LGBT

LGBT is an initialism that collectively refers to "lesbian, gay, bisexual, and transgender" people. In use since the 1990s, the term "LGBT" is an adaptation of the initialism "LGB", which itself started replacing the phrase "gay community" beginning in the mid-to-late 1980s, which many within the...

activists have criticized this phenomenon, saying that fauxmosexuality trivializes real-life homosexuals, both in presenting homosexuality as an "outrageous" novelty, and in glossing over the serious issues faced by young people struggling to come to terms with their homosexuality.