ohmigod
exclamation/ˌəʊmaɪˈɡɒd/
/ˌəʊmaɪˈɡɑːd/
(also omigod, ohmygod)
(also omigosh)
(informal)- used to show that you are shocked or cannot believe something
Check pronunciation:
ohmigod
Definition of ohmigod exclamation from the Oxford Advanced Learner's Dictionary