'egregious offence' is correct and usable in written English.
It can be used to describe a particularly serious or outrageous offense. For example, "The criminal was convicted of an egregious offence, leading to a lengthy prison sentence."
Interruptions of various kinds have long been a problem not only for audience members, but the performers as well, and coughing seems a particularly egregious offence.
His opponents say Mr Wade's most egregious offence is his determination to impose his son, Karim, on the nation as Senegal's next leader.
High treason was the most egregious offence an individual could commit.
As the most egregious offence an individual could commit, viewed as seriously as though the accused had personally attacked the monarch, high treason demanded the ultimate punishment.
While sex crimes against children are widely viewed as one the most egregious types of offences, David Byrne, chair of CoSA's board of directors told VICE that getting funding for the program hasn't been easy.
Speaking to the Guardian via email, Booker-winning novelist Martel explained that he added his name to the letter because of "the egregious nature of the offence … something must be done urgently".
"There are countless footballers plying their trade - most of them in the lower divisions - who have been convicted of various offences which are egregious and some of them have caused people to lose their lives," said Mr Liddle, associate editor of The Spectator magazine.
In particular, the draft bill does not give adequate consideration to slavery and trafficking offences committed against children, which many consider to be particularly egregious; nor, according to those who prosecute slave masters and gave evidence to us, will it make successful prosecutions more likely".
