Half Staff 

To have a half boner or chubby

When you think a hawt girl is looking at you u might be Half Staff

Half Staff by J Stroke October 12, 2009

Half Staff 

When A Man Is Half-Erect.

Look At Tommy, He Is Half-Staff. Will It Do The Trick For His Girlfriend?

Half Staff by Kevin January 26, 2004

half-staff 

A pejorative term for a bisexual

"Uh oh, Tony's acting the half-staff again. Crypto-dyke."

half-staff by Wangbacca February 5, 2009