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1.
A homonym of the popular American Idol star, this phrase describes the act of tucking one's boner into one's waistband to hide an erection. This was described in the popular movie Superbad, when Jonah Hill's character, Seth, remarks, "I flip my boner up into my waistband. It hinds it AND it feels awesome. I almost blew a load into my bellybutton."
This elastic waistband helps me carry underwood around hot chicks without looking creepy.
by Parkinsons July 13, 2008
 
2.
male sex organs carried under a hadron eg. Balls.
as the wood represent the erected penile underwood is the place where a man carries balls.
eg. thats cutest Carry Underwood I ever seen.
by promartinus March 31, 2008