Elliot Daly has been hit with a three-week ban for verbally abusing referee Ian Tempest in Wasps' 31-15 Aviva Premiership defeat at Exeter Chiefs on Saturday.
The 22-year-old centre pleaded guilty to the charge of acts contrary to good sportsmanship at a Rugby Football Union hearing at London Bloomsbury Holiday Inn on Wednesday evening.
Daly was cited for his actions after Wasps' Sandy Park loss, and the England Under-20s graduate will now be free to play again on December 16.
Daly will miss Saturday's Premiership clash with Leicester Tigers and the crucial back-to-back Champions Cup battles with Castres.
The independent panel comprised Gareth Rees QC and Inigo Churchill.
Daly revealed he called referee Tempest to apologise for his outburst, before vowing it will never happen again.
"I would like to apologise for what I said to the referee, Ian Tempest, during our game against Exeter Chiefs," said Daly, who has also been disciplined internally by Wasps.
"The language I used was inappropriate and it was wrong of me to criticise the referee.
"Respect for the referee is paramount and I crossed the line. I have already called Mr Tempest to apologise personally for saying something in the heat of the moment, which I regret and wish I could take back.
"I made a mistake, now I need to take the punishment and make sure it never happens again."