The act of Instantly locking your vision on breasts
that just came into view.
Sometimes occuring when in the middle of a conversation the girl lifts up a first layer shirt revealing a cleavagy
shirt underneath and expects you not to look.
Girls will often call you out on it even though they do it on purpose.
I was in the middle of talking, and you totally b lined when you saw my bikini top that I was revealing in front of you. Perv.