Without doubt; 100% sure.

Ok, this is the best word in the english language. Just say it and it gets plastered into the back of your brain and you're hooked on this one word. Saying it over, and over, and over, and over. I love it.

In-Dub-It-Ab-Ly.

When you eat dirt for the first time and leave your family to build a shack in the woods

Absolutely; without a doubt.

A 'posh' way of saying "Without a doubt" or fo' shizzle my nizzle.

It's a rain forest of syllables in and around my mouth.

A word created and abused by two people to describe things that are certain. (Most commonly spoken with a Brittish accent) Sometimes accompanied with "indeed".

The meaning of this word is undoubtedly, unquestionably, in a matter to remove all doubt.