This page is about the slur as a reclaimed identity, not as a slur itself. If this word is triggering to you, please be cautious about viewing this page.
Maricón, marica or maraco is a spanish slur used against lgbt+ men and effeminate cis-straight men in general. It is similar to "f*g" and "p*ssy" in English, and as such, it's been reclaimed by some of it's targets.
It's female equivalent is maricona/maraca.
Etymology
Maricón derives from the name María, a symbol of women and a frequent first name in 16th century Spain, century in which the term originated.