when do we say obba ?
can a boy say oppa to his older brother as well ?

Question

when do we say obba ? 
can a boy say oppa to his older brother as well ?

Answer

Hi Ayyo,

I think you mean oppa, it's used as a form of address from a younger sister to an older brother, or as a girlfriend to her boyfriend.

A.

Answer

It can be called for...
"your elder brothers in your family" or 
"your boyfriend who is older than you" or 
"a very close male friend who is older than you" in a friendly way. 

Also the spelling should be "o ppa(오빠)" rather than "o bba(오바)".

Answer

오빠 oppa not obba
old brother for a female

Answer

Hi there.  I personally suggest that you may refer to the information that I previously answered to another very similar question for your references.  The corresponding webpage is given in,

http://www.italki.com/answers/question/56562.htm

Good day. / 좋은 일일 을.

Answer

You can say it to your boyfriend also.If he is older than you..