According to Sacred Origins of Profound Things, by Charles Panati, Greek monastic theologian Evagrius of Pontus first drew up a list of eight offenses and wicked human passions:. They were, in order of increasing seriousness: gluttony, lust, avarice, sadness, anger, acedia, vainglory, and pride. Evagrius saw the escalating severity as representing increasing fixation with the self, with pride as the most egregious of the sins. Acedia (from the Greek 'akedia,' or 'not to care') denoted 'spiritual sloth.'
In the late 6th century, Pope Gregory the Great reduced the list to seven items, folding vainglory into pride, acedia into sadness, and adding envy. His ranking of the Sins' seriousness was based on the degree from which they offended against love. It was, from most serious to least: pride, envy, anger, sadness, avarice, gluttony, and lust. Later theologians, including St. Thomas Aquinas, would contradict the notion that the seriousness of the sins could be ranked in this way. The term 'covetousness' has historically been used interchangeably with 'avarice' in accounts of the Deadly Sins. In the seventeenth century, the Church replaced the vague sin of 'sadness' with sloth.
Yes it is a Catholic thing to this day, even if it was not originally.