I usually limit myself to four-letter words.

English: May the malevolent hedgehogs soil your cornflakes.
Irish: Go salaí na gráinneoga cealgrúnacha do chuid calóga arbhair.

Phonetic: guh SAH-lee nuh GRAWN-yoh-guh KYA-luhg-roo-nuh-khuh duh khwihj KAH-lo-guh AH-ruh-wir.

An tInneal Mallachtaí

via Randy.