It stands for Syracuse University's famous "44" jersey number. Football legends, Ernie Davis (Heisman winner), HOF'rs Floyd Little, Jim Brown, ect., all wore the "44".
I've had people see the plate in NYC and Washington and yell out "Go 'Cuse!"
It may be a bit regional, but that's a special number to us here in the Upstate wastelands.....
This is my old plate when I owned this bike before. I now own this bike again but do not have that plate. The bike is a 1984 FXEF but Pennsylvania doesn't permit that many figures on an M/C plate.
I like people to know I'm from someplace other than New York City when traveling out of state. That seems to be the assumption when they see a NY plate.