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

Booty Radar by Ranger_40 July 30, 2015

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.

Lonely Booty Radar by Malcoholic May 6, 2009