rock the boat
To make trouble and risk losing or upsetting something; cause a disturbance that may spoil a plan.
The other boys said that Henry was rocking the boat by wanting to let girls into their club.
Politicians don't like to rock the boat around election time.
rock and roll
A style of popular music with heavily accented rhythm.
Rock'n'roll appeals mostly to youngsters nine to sixteen years old.
Rock and roll became popular for dances about 1954.