To have a half boner or chubby
When you think a hawt girl is looking at you u might be Half Staff
by J Stroke October 12, 2009
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When A Man Is Half-Erect.
Look At Tommy, He Is Half-Staff. Will It Do The Trick For His Girlfriend?
by Kevin January 26, 2004
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"Uh oh, Tony's acting the half-staff again. Crypto-dyke."
by Wangbacca February 5, 2009
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