Someone with technically large feet or body shape similar to a swimmer. In this case, similar to the swimmer Michael Phelps.
"Look at the size of those feet! He looks like Phelpsy! Phelpsy!!"
Used to describe:
1. A performance of epic proportions, one which no one else has ever done before.
2. A ridiculously fast speed.
Named after record-breaking U.S. swimmer Michael Phelps.
1. Our team is playing well, but we're not good enough to be considered Phelpsy.
2. I got pulled over for driving too Phelpsy.