"Please"

Translation: 제발

[DustinStei1]

This word is misunderstood by many kdrama watchers. It isn't just "please" it is a dramatic "pleeeeeaaaase"

[nleconte]

Indeed, see also here for examples.

[oee16]

"My foot!" means something completely different in English ...

[conniestar16]

Isn't it 주세요? Is 제발 informal?

[oee16]

They both mean "please". But "Please" in English can be used in different circumstances:

• as a casual request, then the Korean equivalent is the verb ending -주세요 (polite) or -줘 (non polite)

조용히 해주세요. Please be quiet/Be quiet, please.

• as a pleading reinforcement to request or demand, i.e. "Oh please" or "Please, please" or "Give me a break/Enough." etc. then the Korean equivalent would be 제발 (adverb). And like you said, this kind of expression is for informal use only.

제발 닥쳐! = Oh please, do shut up! / Please, please do shut up!

etc.