This improv game is in the following improv game categories:
4 players, 3 stand with their ears closed, backs turned to the scene. The 4th player gets as a suggestion a common expression.
The idea is that this player has 1 minute to communicate this suggestion to the 2nd player, using only mime and Gibberish . Number 2 then communicates (what he has understood) to number 3, who does the same to number 4. At the end yell Bong Bong Bong and have players 2, 3 and 4 explain what they thought they understood.
A similar technique is used in LCD .