Oatoa Share definition Flag This is an acronym for a sex act that involves, oral sex followed by anal sex, then oral sex again. Oral Anal Then Oral Again Last night I Oatoa'ed that girl I picked up, what a nasty freak! Oatoa by Whoop June 27, 2004 0 0 Get merch Get the Oatoa mug. Buy Now — $32.95 See more merch