eat your brocoli
a rude way of saying you're too dumb to question the dumb things people tell you to do
Your mom says, 'Eat your broccoli,' because you asked why you had to do your homework on Sunday.
Your teacher says, 'Eat your broccoli,' because you asked why you had to run laps during math class.
Your brother says, 'Eat your broccoli,' because you asked why you had to eat that weird green stuff again.