Blocker people will block you by driving slower than posted speed. or that block you by talking on cell phones while placing an order, or block you by having to call someone to ask their opinion on a possible purchase while in check out. Basically those are blockers that can't make up their mind and stand there blocking every one else from doing their tasks.
Term to describe the species of homosapien hippopotamus maximus beast which inhales big macs and only befriends attractive, desirable females. Follows said slender females around with turkey leg in purse and listens to, influences, and gains approval of attractive friend with the sole purpose of preventing males from reproducing with aforementioned females using various tactics such as lying, manipulation, and social media to thwart repeated attempts of male sex to court, date, and have sex. Sometimes slips in bite of said turkey leg and big mac in between cockblocking victories.
Goddamn fat ashley just snuck a quick big mac in the bathroom. She's such a massive blocker. No one here is gonna get laid tonight.