When your phone makes a sound indicating that a text message has arrived. It is usually the default sound.

It can also be a derogatory reference to the value of the message where the message is worth less than the sound the message arrival makes.
After getting four incoming text messages, all of which were ignored, Timmy said, "My wife has been budalumping me all day".

"I hate the badalump."
by Zarbuck November 14, 2011
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