Definition of talk through one's arse (or backside) in English:

talk through one's arse (or backside)

(US talk through one's ass)

phrase

informal
  • Talk foolishly, wildly, or ignorantly.

    talk nonsense, talk rubbish, babble, ramble, gibber, burble, blather, blether, prate, prattle, gabble, chatter, twitter, maunder
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