Ben diyorum çanakkale boğazı, sen diyorsun yandı götümün ağzı

Lit: I am talking about the Dardanelles, you are talking about your arse being on fire.

Meaning: The Dardanelles, formerly known as the Hellespont (Greek: Ελλήσποντος, Hellespontos), is a narrow strait in northwestern Turkey connecting the Aegean Sea to the Sea of Marmara. Hence, this proverb puts forward that the topic on which person A is talking about (i.c. Dardanelles) has no connection at all to what person B is proclaiming(i.c. an arse on fire). Alternatively, you can use this sentence when somebody is telling a boring story that has nothing to do with anything. It will confuse your partner, silence him/her, most likely because he or she does not know where the Dardanelles are are situated.

Thanks are due to B.K. for this proverb.