US English (what Americans say instead of these UK English words)
Flat
Apartment
FAQ
Frequently Asked Questions
Lense, shutter, flash
Camera
Cow
Calf
Once in a blue moon
If something happens once in a blue moon, it happens rarely.
Lift
Elevator
DIY
Do It Yourself
Saddle, pedal, wheel
Bicycle
Goat
Kid
Burn the midnight oil
To work late in the night
Biscuit
Cookie
LMK
Let Me Know
Hands, strap, face
Watch
Horse
Foal
Cut corners
If you cut corners, you save money or effort by finding cheaper or easier ways to do things.
Postbox
Mailbox
AFK
Away From Keyboard
Button, collar, cuff
Shirt
Bear
Cub
Keep an ear to the ground
Be well informed of current trends, opinions, and happenings
Boot (the back of the car)
Trunk
BRB
Be Right Back
Tongue, sole, laces
Shoe
Kangaroo
Joey
Put the cat among the pigeons
If you put the cat among the pigeons, you say or do something that makes lot of people angry or uncomfortable.