An all-in-one pajama outfit for kids. Usually made of blanket-like material with rubber feet.
"When I was a kid, I defecated in my Trundle Bundle because I couldn't get it off fast enough."
by PoweredByLolcats November 05, 2008
When someone nearly falls down the stairs and does a ridiculous stumbling dance called a trundlebundle
Did you see that n00b trundlebundle?
by Brian, April 27, 2008

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