Oomf means twitter email

I think there may be a bit of confusion here!

"Oomf" is not a commonly used term to refer to Twitter or email. In fact, I couldn't find any evidence of "oomf" being a widely recognized abbreviation or acronym.

Twitter is often abbreviated as "TW" or "T", while email is often abbreviated as "e-mail" or "EM".

If you could provide more context or information about where you heard or saw "oomf" being used to refer to Twitter or email, I might be able to help clarify things for you!