Cooper's twitter blooper

Wallaby playmaker Quade Cooper has come under criticism for a tweet laden with foul language targeted at an unknown critic after the clash with Argentina in Mendoza on Saturday.

"Invite me to youre (sic) next team discussion then ask me how much I give a f--- about your team selection," Cooper wrote on his Twitter account. "Zero f---s given....."

Cooper posted the tweet at 4.49am Mendoza time, the city where the Wallabies had just finished their game.

The 27-year-old came off the bench early in the first-half to replace the injured Matt Toomua in an unfamiliar position of inside centre - a role he hasn't played since his early days at the Reds and he found himself isolated behind the advantage line a number of times and was yellow carded for a challenge that was high and late.

Although there was speculation that the tweet may have been directed to the Wallaby camp, it is unclear who Cooper was directing his message toward, or why he decided to unleash his online tirade but the controversial post  - which has now been deleted - notched up over 100 retweets in an hour.

Cooper was back on twitter just after 9 am local time in Argentina to apologise for any offence he may have caused. 

The meaning of the tweet remains unknown but early sources in Camp Wallaby suggest it may have been aimed at an online critic rather than anyone inside the team.