Booty Radar
The thing girls use to see if guys want the booty or not
Ben thought Sam was hot so he tried to get on her booty radar
Lonely Booty Radar
Also known as LBR, a male radar which helps said male locate a lonely hot girl at a bar. In most cases, the person using this radar is also using all five senses to strengthen the signal on the radar.
My lonely booty radar is picking up something. I got two to my northwest. Found 'em.