bandwagon jumper

A bandwagon jumper is someone who changes from one team/political party to the other.

When the Red Sox won the World Series, their fans at the parade were mostly bandwagon jumpers.

March Madness is full of bandwagon jumpers. In 3 weeks, anyone knows everything about college basketball. When it will be over, they will forget it

by da Fro March 16, 2006