A game where you translate a random sentence on Google Translate multiple times to make it become broken English. It's called Google Telephone because it refers to the game Telephone that we would always play in grade school.
Steps how to play:
1. Translate a sentence into a random language
2. Take the new translated sentence and translate that into another language
3. Repeat step 2 multiple times (around ten times is good)
4. Translate the sentence back into English
5. Enjoy (the sentence will be far from what you started with)

Literally everyone, ever. Including the writer of this definition.