a person who refuses to believe anything until they are given proof.

He's a real doubting Thomas - he simply wouldn't believe I'd won the car until he saw it with his own eyes.

• Give an inch and they'll take a mile.
• pick something apart
• pick something off
• pick something to pieces
• pick to pieces
• pick up
• pick up marbles
• pick up marbles and go home
• pick up marbles and leave
• pick up on
• pick up on something
• pick up something
• pick up speed
• pick up steam
• pick up the ball and run
• pick up the ball and run with it
• pick up the bill
• pick up the bill for
• pick up the bill for something
• pick up the gauntlet
• pick up the pieces
• pick up the slack
• pick up the tab
• pick up the tab for
• pick up the tab for something