a phrase of description used when the word freak is simply not a large enough word to contain their freakishness. (the person being described probably belong on a leash too.)they are either extremely weird, perverted, or stalkerish.
Person #1: OMG
did that freak on a leash Cameron just start humping
your shoulder for no reason? EWWWW!
Person #2: EW now i have to burn my sweater!
Person #1: Omg what is that kid Noah wearing? A SILVER TUXEDO? WHAT?
Person #2: wow what a freak on a leash
Person #1: Is that CAMERON peering through your WINDOW? EEKKKKKK! ITS A FREAK ON A LEASH!
Person #2: No smart one, thats your reflection. But Cameron IS a freak on a leash