A precursor to the
hard on, a cousin of the
half schaff, and little brother to the
half wood, a sudden rush of blood to the penis resulting from visual or aural stimuli, whether sexual or otherwise. Usually felt and identified when the male
member first comes into contact with the fabric of the pants; often concealable with proper use of misdirection and hand gestures.
Bro: Dude, when your mom called my name to get my attention the other day, the sound of her voice made me pop a part on. I had to keep scratching my nose so she wouldn't notice the extra weight in my
package.
Bro's bro: Dude, you're a
douche.
