meaning of "frankly revolting"

[Learning_English]

It is the frankly revolting tradition of killing animals, taking their skins off, then stuffing the skins with padding to resemble the shape of the dead animal. You see a lot of stuffed animals in museums

Please explain the meaning of bold words.

I already tried in many dictionaries.

But I am so weak in english that I can't understand that tough english.

So, please you explain the bold words with your own simple words.
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Please let me know if I have made any mistakes in any of my sentences.

[Conchita]

Frankly has the sense of 'speaking truthfully'.

Something revolting makes you feell ill. Another word for it is 'disgusting'.

Padding or stuffing is the soft material used to fill things like cushions, chair seats or, in this case, the skin of a dead animal.