A shutterbug. = The same as a camera bug. People who like to take pictures.
Now with the smartphones, everyone is a shutterbug.
Mea culpa. = Through my fault.
If you are to blame for something, mea culpa is in order.
To keep your chin up. = To keep your spirits high.
If things are down, keep your chin up and everything will be OK.
NUNYA. = None of your business.
If someone asks about my personal finance, I tell them NUNYA.
A shotgun wedding. = A forced wedding due to pregnancy.
Shotgun weddings occurred during the early 20th century.
To scoot.= To move quickly. Scooter.
I am sorry, but I really must scoot.