expression, noun
long, narrow house; eel bed house
Colloquial expression likening a very narrow, deep building to an eel's resting place. Often used for traditional Kyoto townhouses (町家) or similar narrow urban dwellings.
京都の町家は「うなぎの寝床」と呼ばれる細長い家です。
Kyoto townhouses are long, narrow houses called 'eel beds'.
この店はうなぎの寝床みたいに奥行きがある。
This shop is deep and narrow like an eel bed.