Booblock 

The involuntary, unavoidably prolonged stare towards an uncommonly magnificent set of breasts once initial visual contact is made, due to size, revealing clothing or erect nipples. Often unbreakable, even when discovered and berated by the owner of the breasts.

1. "Shit dude, that chick totally busted you looking at her fine tatas." "I couldn't help it man, tried to look away but one glance and I got booblock!"

2. Harvey casually glanced over at the blond hottie in the next row at the ballpark, and seeing a gratuitous flash of nipple down her shirt as she bent over to reach in her purse, he had booblock for the rest of the game.

Booblock by Grafikman November 22, 2006

Booblocker 

A type of shirt worn by women that has a separate piece of fabric with an elastic under side making it very difficult for the hand of a guy to find its way to the bra and breast area.

Last night when the girlfriend and I were fooling around I couldn't get past her booblocker.

Booblocker by Johnnyway December 3, 2010

Booblock 

When two woman/girls are hugging and one ladies/girls boob gets trapped inbetweeen the other girls/woman's two boobs forming a booblock

We hugged and suddenly I was in a booblock

Booblock by Skull note August 12, 2016