a popa is the scruffiest man in the town/city usually lives life scrounging money for drugs and such. Always on jobseekers/welfare,also a popa will cheat at everything they get aswell as girlfriends on holidays in tennerife/other hot places they dont care about anything except themselves. you will recognise a popa when they are being aggressive and threatening people
dude you totally did a popa on that cruise ship last week.
omg that guy is such a popasaurus, omg