弥天大谎

a pack of lies (idiom)

full / to fill / completely / more

brimming or overflowing

filling the entire sky / covering everything (of fog, crime, disaster etc)

day / sky / heaven

gargantuan / as big as the sky / enormous

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

lies / to lie