A 3 inch long sweet caramel chewy candy.

A white man with a huge penis that looks brown in the middle and a creamy white color at the tip

Can be used in place of any word. In other words, it means anything and everything you want to it mean.

A TootsieNazi is basically someone who corrects what you said but replacing it with the word TootsieRoller. Usually they follow up with something along the lines of "Can you use Tootsie Grammar, please?"