: In slang and hip-hop lyrics, "45" typically refers to a .45 caliber handgun or a 45 RPM vinyl record .
The keyword likely represents a specific or a lyrical snippet from a niche artist.
The phrase can be broken down into three distinct conceptual parts: 1. "FU10" & "The Galician"
: A mix of Galician identity (traditionally associated with folk music and rugged landscapes) with modern urban aesthetics (implied by "45 full").