mahogany gaspipe

Interjection

1. (Ireland, dated, slang) a representation of how the Irish language sounds to a non-speaker; gobbledegook.
   • It is completely false to suggest that Irish was ever the natural or the native language of this city of Dublin, or of any of our other cities. I always think that Dubliners' attitude to the Irish language is summed up in four words: “Tá sé mahogany gas-pipe”.1962 June 5, Patrick Byrne, “Committee on Finance. - Vóta 30-Oifig an Aire Oideachais (Atógáil).”, in Dáil Éireann debates, Vol. 195 No. 14 c. 2013
   • "Thaw shay mahogany gas-pipes" is a venerable native witticism. It is the facetious Gaelic sally of a person without Gaelic. Suitably mouthed, it sounds frightfully Irish. Leaguers resent it as a sneer.1967 October 30, Myles na gCopaleen, “Language Please”, in The Irish Times, page 10

Noun

mahogany gaspipe (plural mahogany gaspipes)

1. (Ireland, dated, slang) A Gaeilgeoir.
   • I’ve been watching you for the last ten minutes and damn the thing you’ve done except yap, yap, yap the whole time. The Chief or the Governor or any of them could have been watching you. They’d have thought it was a bloody mothers’ meeting. What with you and my other bald mahogany gas pipe here.1956 Brendan Behan, The Quare Fellow Act II (Grove Press (1957) pp. 59-60)