each immediately following the other.

They were the first team to win three championships back to back.

Etymology: based on the literal meaning of back to back (= with your back pressed against another person's back)

• the show must go on.
• the silent majority
• the silly season
• the silver screen
• the sixty-four-thousand-dollar question
• the sky's the limit
• the sky's the limit.
• the slings and arrows
• the slings and arrows of outrageous fortune
• the small hours
• the small print
• the smart money
• the smoke
• the socks off
• the socks off someone
• the soft sell
• the something of dreams
• the something of your dreams
• the spectre at the feast
• the spirit moves
• the spirit moves you
• the staff of life
• the stage is set for
• the stage is set for something
• the state of play