Definition of ZOMG in English:

ZOMG

exclamation

informal
  • Used to express great surprise or excitement.

    ‘ZOMG!! I finally managed to reformat the file’
    • ‘There were many a thoughtful gifts: including the (zomg) massage!’
    • ‘ZOMG okay my love for meat has been rekindled.’
    • ‘Zomg the Mango Fish Wrap is damn nice!’
    • ‘Zomg, the effects are so dated.’
    • ‘And zomg I was there from 6.30 pm-10.30pm.’
    • ‘He broke the Olympic Record with a throw of 90.57 - zomg that's like 57 times my height.’
    • ‘So you're right, ZOMG!’
    • ‘And zomg I love the evil villains.’
    • ‘Ahhh I met Dougie up close and touched his hand ZOMG.’
    • ‘Then ZOMG THERE IS MY DAD STANDING RIGHT ACROSS THE ROAD!’

Origin

Early 21st century: supposedly resulting from fast or careless typing of OMG, during the course of which the shift key is missed and the 'z' key pressed instead..