watch (your) step

to be careful in a situation that could be dangerous.

You have to watch your step when you're dealing with him, as he has an awful temper.

Related vocabulary: watch your back

• 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
• the status quo
• the story of life
• the story of someone's life
• the straight and narrow
• the straight and narrow path
• the straw that breaks the camel's back
• the swing of things
• the tables are turned.
• the tail end of
• the tail end of something