"oh and" is the new "p.s."
When used properly, "oh" corresponds to "post" and "and" corresponds to "script".
One may add a second "oh and" by simply putting a second "oh" in the beginning of the statement to designate another
afterthought. It should read as follows "oh oh and", which would
correspond to "post
post script".
In context it should read like the following example: