A game changer.= Something that changes the atmosphere or the direction of an event.
The rejection of the national stadium design was a game changer in the preparation for the Olympics.
A text walker.= Someone who walks and texts at the same time.
Text walkers are annoying and should be shot.
A snag.= A tanglement, difficulty.
I tried to make an investment but I ran into a snag because of my nationality.
Swag.(Slang)= To swagger to walk and talk with confidence.
I wish I had swag.
To throw a wrench into something.= To stop the progress or to break it.
Construction noise throws a wrench into my class.
To throw shade on.= To have something bad to say about something or someone.
China always throws shade on Japan.
To show your chops.= To show your guts.
If you want to succeed, you must show your chops every day.
One-track mind. = Single mindedness. To pursue only one goal.
As far as success is concerned, I have a one-track mind.
Morning Joe. = Coffee in the morning.
I can't function without my morning Joe.
You betcha. = You can bet on it or for sure.
Can you swim a 100 meters? You betcha.