underconstumble 

To understand, mostly. Something you say when you think you've almost got it, almost understand.

After being told to remember a long list of directions to get to the airport, she said, "I underconstumble".

underconstumble by Larke October 22, 2008

underconstumble 

It basically only means understand. Its a way to make yourself sound like a 6 year old.

"Dude: Hey, sorry I couldn't go for a walk with you today. Mom wanted me to go to town."

"Dudette: Yeah its all right, I underconstumble."

"Dude: what are you, six?"

underconstumble by BranMuffin11 October 20, 2008

Undercustumble 

To understand, usually used at the end of an arguement.

That's the last time I'm telling you! Undercustumble!

Undercustumble by WingDingles April 1, 2021