(Noun) When your boner physically gets in the way of you and a girl, typically in a scenario where you are experiencing intimate contact.
I was up on my girl making out, but my boner barrier separated us apart telling me it's go time.
December 12, 2011 Urban Word of the Day
A binder or notebook hormoney, middle and highschool boys use to conceal errant erections or NRBs. If one cares to realize, use of a boner barrier is rather obvious due to the uncharacteristic way the binder or notebook is pressed against the crotch region.
"Man, Jenny is looking pretty fine today, I'm thinking of asking her to the 8th grade prom."
"yeah, she can touch my digital pet any day of the week."
"::school bell rings:: Quick, throw me your notebook, I need a boner barrier."