Top Definition
A pain in the bum...especially a crying baby
Esteban = BUMPAIN!!!!

Song to calm a crying baby

(Tune: You Are My Sunshine)

You are my Bumpain, my little Bumpain
You make me crazy when you cry loud
You'll never know (baby's name)
How much you're crying
Please don't take my Bumpain away
by Patrick Moose November 13, 2008
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