like a lamb
From Longman Dictionary of Contemporary Englishlike a lamblike a lambOBEYquietly and without any argument Suzie went off to school like a lamb today. → lambExamples from the Corpuslike a lamb• While others were being lionised he conducted himself like a lamb or even a mouse.• March, according to the weather proverb, comes in like a lion and goes out like a lamb.• Suzie went off to school like a lamb today.• I certainly don't like lamb for three meals running.