Strike out
In baseball a player is "out" after three strikes.The baseball player did not strike out at all during the game.
Strike it rich
To suddenly become rich or successful.The man struck it rich when he got a job at the computer company and was able to buy some stock very cheap.
Strike a sour note
To signify something unpleasant.The statements of the speaker struck a sour note with many members of the audience.
Strike a pose
To position oneself in a certain posture or pose.The model was asked to strike a pose for the photographer.
Strike a match
To light a match.I struck a match and tried to start the fire.
Switch gears
To suddenly change what you are doing.The sports announcer suddenly switched gears and began to talk about something else.
Swing (something)
To make something happen.I do not know if I can swing buying an expensive present for my girlfriend.
Swing into action
To start doing something.The members of the football team swung into action and cleaned the room after the party.
Swim against the tide
To do the opposite of what most people are doing.Our company often swims against the tide in the way that they market products.
Swim against the current
To do the opposite of what most people are doing.My friend likes to swim against the current and not do what others are doing.