It's like when someone imitates someone else or does something cool after someone else already made it cool, basically saying someone is "riding the coattails" of the person before them.
A political candidate that gains a great deal of popularity primarily from family name, vise from receiving recognition through his or her own limited accumulative achievements within time of service. Term derived from the adage, "riding on coattails," more often in reference of a son, gaining influence by the popularity of his father, without achieving influence on his own merits.
The act of crossing the street because someone before you has already crossed and caused traffic to stop. In effect, jay walking because someone else already has.
I rode on this guy's Jay Walking Coattails after he jumped in front of traffic and caused a 30 car pile up.