When someone is about to say something or show something unpleasant and you are using your words or a physical object to stop it leaking out into the public.
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as a noun:
something very offensive.
Placeholder for something that you dont want to say out loud.
Thats so rude of her to say, you should make sure to tampax her next time.
Tampax is a brand of tampon devised by the city of St. Petersburg, Florida in an effort to make the adjacent city of Tampa look less appealing. It didn't work.