Go to a thrift store and get a quirky old suit and a fun accessory such as a hat or an ascot. Carry around some random prop like maybe a piggy bank, a trowel, a shoe horn- something that could be character specific. When people ask who you are, make them guess and then laugh at them for not being clever enough to get it right.

I hate those costumes where everyone has to ask who you are. Stupid hipsters and their “I read a book once!” attitude.