Marcelo hit back at online trolls at the weekend after coming in for flak for wishing Barcelona's Neymar a happy birthday before Real Madrid mate Cristiano Ronaldo.
Social-media users critical over order of messages...
The left-back took to his Instagram account on Sunday to send a message to Brazil colleague Neymar as he turned 25, posting a photograph of the pair together after winning the Confederations Cup with the Canarinha in 2013.
But some followers were unhappy he had not first offered his wishes to CR7, whose 32nd birthday was on the same day - and let him know in no uncertain terms.
Marcelo bites back with foul-mouthed slap-down
But the player delivered a forthright response, writing: "Shut the f**k up idiots".
Marcelo then went on to publish a birthday tribute to Cristiano, featuring an image of the Real Madrid duo celebrating a goal for Los Merengues.