read (someone's) mind - to know what someone is thinking without being told.

If something's bothering you, then tell me. I'm not a mind-reader, you know!

• run with it
• run with the hare and hunt with the hounds
• run you down
• run your eye over
• run your eye over something
• run your mouth
• run yourself into the ground
• rush of blood
• rush of blood to the head
• rustle up
• at first hand
• at first sight
• at full pelt
• at full steam
• at full stretch
• at full throttle
• at full tilt
• at hand
• at heart
• at heels
• a thick skin
• a thing of the past
• a thing or two
• a think-tank
• a thin line