oh my science
A pun which is contrived from the common exclamation "oh my god". The intention of the user of the expression is usually, in addition to expressing exclamation, to also draw subtle humour at the grand religion vs science debate (regardless of whether religion and science are truly mutually exclusive in the first place).
Oh my science! You wouldn't believe what I just saw.
Ha ha ha, you atheist. So what did you just see?
Ha ha ha, you atheist. So what did you just see?