"Bleep-bloop"

Bleep-bloop is a sound that refers to the sound effect that plays on the Xbox 360 when the player earns an achievement or recieves a notification. It is expected that either MLB, PN, or both will make this sound when a notification pops up.

"Bleep-bloop" was originally said by Caboose in the web-series Red vs. Blue. The video was based on the RvB cast making their own achievements while Caboose made fake-looking ones and said "bleep-bloop" everytime they appeared.