gun-spotting
the girl-perve version of boob-watch. basically rate the muscles of boys walking past, whilst keeping in mind what it would be like to have sex with them.
"let's go gun-spotting outside university halls to check out some fresh-gun-meat"
"shall we revise today?... nah let's go gun-spotting in Nando's"
"shall we revise today?... nah let's go gun-spotting in Nando's"