"An bhfuil tú thar lear?"
Translation:Are you abroad?
'thar' is a preposition meaning 'over, beyond'. 'lear' is an older word for 'ocean, sea'. Thus 'overseas'. Given Ireland is an islands, 'overseas' and 'abroad' basically mean the same thing.
In Irish mythology, 'lear' was a personification/god of the sea. Contrary to appearances, he has nothing to do with 'King Lear'.