A shot in the dark

An attempt at something without much hope or chance of succeeding.The attempt to find the small boy was a shot in the dark.

A shot in the arm

Something inspiring or encouraging, a boost of energy.My job search got a shot in the arm when the company president called me for an interview.

Short shrift

Rude treatment.The woman received short shrift from her supervisor when she asked for a holiday.

Short on (something)

To be lacking in something.The man is short on patience and is often angry.

Show up

To appear, to arrive, to be present."What time did your friend show up for the party?"

Show (something) to good advantage

To make something look good, to make something stand out.The new paint helped to show the house to good advantage.

Show (someone) up show up (someone)

To do better than another person while others can see you.The girl always shows her friend up by doing all of her schoolwork quickly.

Show (someone) to his or her seat

To direct someone to a place to sit.The usher showed the man to his seat.

Show (someone) the ropes

To tell or show someone how to do something.The experienced carpenter made a great effort to show the new trainee the ropes.

Show (someone) the door

To ask someone to go away.When the man started yelling in the restaurant the manager quickly showed him the door.