Cowboys enforcer Josh McGuire faces suspension for a foul-mouthed tirade at NRL referee Grant Atkins in Sunday's clash.

McGuire was sent to the sin bin in the first half of his side's 36-20 loss to the Melbourne Storm on the Sunshine Coast for the vile spray.

It was not clear at the time what the 30-year old said to Atkins which caused him to be sent off after getting up from a tackle.

However, the ref's audio mic has revealed the foul audio.

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โ€œF*** me, c***โ€, McGuire said to Atkins.

Atkins then blew his whistle to stop the play, before responding: โ€œYou can go to the bin for that.

โ€œIโ€™m not copping that dissent, Iโ€™m not going to repeat what you said but you can go.โ€

The Storm scored twice in the period that McGuire was off the ground to lock up a top-two finish.