Duckumpucky 

Refers to a sticky substance that is commonly used to fill or close seams or crevices.

A window or door caulking.

Silicone.

The carpenter used duckumpucky to fill in the cracks after installing the new window.

Duckumpucky by ChuckWhitson December 28, 2008

uckumpucky 

any substance that is put on an object to seal off a hole,crack,seam,etc or hold an object together

The gasket was leaking so I put some uckumpucky on it

uckumpucky by Ethanshack November 29, 2004