Robbin Crosby (August 4, 1959 - June 6, 2002), born Robbinson Lantz Crosby, former guitarist in the glam metal band Ratt, who had several platinum albums in the U.S. in the mid to late 1980s.

Robbin Crosby's guitar playing was largely influenced by guitar hero Jimi Hendrix. He joined Ratt in 1982 as a co-lead guitarist with Warren DeMartini.

Albums (with Ratt):

• Ratt EP 1983
• Out of the Cellar 1984
• Invasion of Your Privacy 1985
• Dancing Undercover 1986
• Reach for the Sky 1988
• Detonator 1990

Not much is known about Robbin's personal life. Robbin was 6'6" tall, and weighed around 245 pounds at his healthiest. He married Laurie Carr in 1987. They had no children. He had a reputation for the "rock and roll lifestyle" during Ratt's heyday, and he was a habitual heroin user for some time.

By 1990, Crosby's use of heroin and other drugs began taking over his life. There would be shows where he literally couldn't play. Due to the shame he had placed on his band and himself, he left Ratt. Later, Crosby worked as a producer for fellow metal band Lillian Axe, but always felt a feeling of guilt for wounding his real pride, Ratt.

In 2001, Robbin Crosby publicly admitted that he had full-blown AIDS. He probably contracted HIV sometime in the late 1980s through a tainted needle while taking heroin. Crosby died in Los Angeles on June 6, 2002, two months prior to his 43rd birthday. Contrary to popular belief, he did not die from AIDS. Rather, he died from a heroin overdose.