"ag dul siar ar bhóithrín na smaointe"
The Irish (Gaelic) phrase for reminiscing.
Literally, "going back down the little lane of thoughts; going back on the road of ideas"
bhóithrín "a small, quite often badly maintained track or lane, commonly found in rural areas."
Think of English "taking a trip down memory lane" but I like that idea that, even if the road is badly maintained, you're still going travel down it to visit a cherished memory.
(VERY roughly pronounced : ag dool she-ar air vo-run na shmin-cha)