Salah was basically warning that if he kept talking about a particular controversy – most likely the way referees or FIFA‑run officials handled a recent decision that affected Liverpool – he could be hit with a fine under FIFA’s Code of Conduct, which penalises players for publicly criticising officials, match‑fixing allegations or governance issues. The governing body has a strict “no‑talk‑about‑the‑referee” rule, and breaching it can cost a player a hefty sanction, so he chose to be vague. By saying “I don’t wanna pay a hefty fine from FIFA” he was hinting at his frustration without naming anyone, a tactic many players use to avoid formal punishment. Fans picked up on the subtext – they understood he was venting about a decision they also felt was unfair – even though he didn’t spell it out. In short, it’s a subtle criticism of a behind‑the‑scenes issue that could land him in trouble if he spoke more openly.