Means "right the fuck off", which is usually used when expressing a mix of anger and seriousness.

Used is past, present, and future.
Guy 1: Hey man, i tlkd to Daniel ystrdy. He was bein a ttl dick to me.
Guy 2: Daniel? He pisses me rtfo!
by Nightbeing February 25, 2010
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Abbreviation for 'Rest of The Fucking Owl'. After a Reddit group by the same name. Used to tell someone that they left out key information or steps.
Person 1: Explaining how to change a tire. "Take the flat tire off, get your spare, and put the spare on in it's place."

Person 2: Where's the RTFO?
by rma42 April 13, 2019
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