Pants that a dude can wear at home or out on the sidewalk and have an erection aka a boner without folks noticing with no discomfort or embarrassment or discomfort. So a guy can sit at home say watching a porn movie while wearing his boner pants he can then jerk off his wang under the pants without anyone knowing or noticing!

Boner Pants are all the rage these days...

Legend
Boner Pants – saying – My girlfriend and I went out to lunch. I forgot not to wear to wear my boner pants, and now she thinks that she helped me achieve an erection. I'm not quite sure if this is a curse or a blessing, but at least she knows that I don't have a small penis. - Attribution to UrbanDictionary.Com