Spanish slang, not used in 'polite' circles. Usually used by Cubans. Describing a petty act, not quite malicious, usually but not always anonymously.
Raul telling Carlo's girl he cheats on her was a real mariconada
by Farruco November 11, 2010
Mariconada: derived from the spanish word "maricón"-gay, faggot. Usually the acts of a maricon, but also all kinds of things that are "gay" or lame etc.
La última pelicula de Almodóvar es una mariconada!
by Pacheco March 10, 2004