PM Marjan Šarec commented on a Christmas greeting by an Education Ministry State Secretary.
The pm said that the post was "highly inappropriate" for a senior state official. He added that if he were a member of his party or his cabinet, he would have been dismissed immediately.
On Christmas Eve, the official twitted a photo saying "Merry Christmas Ya Filthy Animal", a famous quote from Christmas classic Home Alone 2.
In the wake of the incident, there has been a petition to get him to step down.
The secretary apologised for the controversial post already last year.