The good news is that, despite appearances, this word is nothing to do with eating stuff that's been regurgitated (and some of us do: baby pigeons, for instance).
No, ingurgitate means to eat greedily and in large quantity.
But even if you do know what ingurgitate means, regurgitate still casts a nasty and rather sticky shadow over the word.
Word Not To Use Today: ingurgitate. This word comes from the Latin word ingurgitāre, to flood, from gurges, abyss.
Even more yuk.