What is Fyg?
1.
Acronym for Fuck Your God, a proper response to somebody freaking out on you and starting their sentence in OMG.
"OMG what the hell is your problem"
"FYG and get lost nobody cares about your pointless bullshit!"
See
2.
Abbreviation for 'first year girl'. Usually only applied to sexy first year girls.
'What are the FYGs doing?'
See