it was all i could do.. >:(

i was reading a book this morning and it said "it was all i could do not to roll my eyes"
what the feck??
what does 'it' mean??
what did u do??
'it' is not a verb!!!!!!!
feck i hate this expression!
ugh it pisses me off so much.
>:(  D:<
feck arse bum bum arse merde sacre bleu merde