"Underwear Goes Inside the Pants" is a song by Lazyboy, a musical project combining spoken word with hip hop beats and other musical styles, with vocals on this track by stand-up comedian Greg Giraldo.

Giraldo speaks in an observational humour style critical of American society, discussing issues such as the legalisation of marijuana, the homeless problem, and the obesity epidemic.

The accompanying music video was shot in Los Angeles with homeless people singing the chorus.

The song was a hit in Australia in 2005, reaching number five.

^ Shipments figures based on certification alone.