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The sound of a cel phone notification as heard by the person you are in conversation with.
The bibbit sounds like a lamb bleating

Bibet I hear the bibbit again.bleatingbeep beep I hear frequent bibbits from your celphone vibrating
by HammrG January 01, 2018
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May 12 Word of the Day
When someone goes to the gym and spends 90% of the time on their phones scrolling through social media
Looks like its thumb day again for Jimmy with his usual routing... 3 sets of 5 snapchat selfies and 10 sets of scrolling through facebook until exhaustion
by Gary br April 02, 2017
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