Conor McGregor took to social media late last week to take aim at RTE.
The Dubliner called the under fire broadcaster a "laughing stock" as he launched an explicit rant at them.
RTE has been engulfed in crisis following revelations last month that it underreported the salary paid to star presenter Ryan Tubridy and failed to disclose €345,000 worth of additional payments to him between 2017 to 2022.