Roy Estrada (also known as "Roy Ralph Moleman Guacamole Guadalupe Hidalgo Estrada" and "Orejón"; born April 17, 1943 in Santa Ana, California) is an American musician and vocalist, best known for his bass guitar work with Frank Zappa and the Mothers of Invention and for having been a founding member of Little Feat, playing on their first two albums.

He is also a convicted sex offender, having had two criminal convictions for molesting a child in 1994 and 2012, and he is currently incarcerated, ineligible for parole until he is 93 years old.