>>>>"tub stopper" is another funny expression... what do you do when someone yells "stop that tub" in a comedy movie, when a bathtub slides downhill? Use the tub stopper?
>>>
>>>We call that a plug.
>>
>>Is it 220V or 110? :)
>
>(Chortle) Bath plug or sink plug.
>
>BTW a faucet is a "tap" here. An electricity "outlet" we call a "socket" - hence plug and socket.

Seems to be the word "tap" is still in use this side of the puddle, but only in case of beer flowing through it. "Faucet" seems to sell better, maybe because it sounds French.

>>I.e. "čep" is another word missing in English. Can't say "cork" because it's the kind of wood; can't say "plug" because it's predominantly used in cabling, can't say "stopper" because it's too vague. "Čep" means nothing more or less but a piece used to tightly close or cover a small opening - be it on a barrel, bottle, or an air mattress. Hence, "začepi" (cork it in) is our expression for "shut up".
>
>How about "bung"?

If it applies to all sort of bottle lids (cork, beer-type, screw-on), why not.