Og-gus fawg-wim-eed shoed(shoe as in footwear) mar athaw shay. There are different ways of pronouncing Irish depending on which dialect you speak (ie which part of the country you are from or learned to speak Irish in). There was a Gaelic script before the roman alphabet and this was taught in Irish schools until there was a standardisation on roman type and standardised spelling which came in in the late 50s early 60s.

In fact once you get to know the various sounds, Irish is more consistent to pronounce than english is - there aren't anomalies in pronouncing words like bough, tough, and ought. Its also harder to pronounce if the accents (fadas) are omitted, as they often are in typed prose or here on the internet.