sleep like a baby: sleep very well

→ He spent the whole day working in the garden and mowing the lawn. After all that hard work, he slept like a baby that night.

smooth as a baby’s bottom: completely smooth; often used to talk about a man’s head

→ Steven started losing his hair at age 30. By the time he was 50, his head was smooth as a baby’s bottom.

in the family way: pregnant

→ Loretta couldn’t wait to tell her friends that she was in the family way and would have the baby in December.

pregnant pause: stopping for a short time during a speech before saying something important

→ The teacher announced that she would give the results of the big test. After a pregnant pause, she said that everyone had passed.

a chip off the old block: just like a parent

→ James was a chip off the old block; he loved to read about archaeology, just like his father.