Eagle Eye!
You whisper 'Eagle Eye!' to your buddy when you spot a hot person. It means you're both drooling over the same juicy meat.
'Eagle Eye!' I whisper. 'That chick at the burger place is my type.'
'Eagle Eye!' he says. 'That dude in the gym is looking at me like I'm a free meal.'
'Eagle Eye!' we both shout. 'That girl just walked in like she owns the place.'