noun, noun or participle which takes 'suru', intransitive verb
crashing out; lying down to nap; falling asleep in one's clothes
Casual word for flopping down and dozing off, often without changing clothes or getting into proper bedding. The ごろ part is onomatopoeic for rolling or lounging.
休みの日は、よく昼までごろ寝してしまう。
On my days off, I often end up crashing out until noon.
疲れて帰って、そのまま床で
I came home exhausted and just crashed out on the floor.