An idiom meaning a room or place is so cluttered that there is no space even to set one's feet; figuratively used for extreme disorder or crowding.
引っ越し前で箱だらけで、部屋は足の踏み場もない。
Before moving, the room was full of boxes — there wasn't even room to put your feet.
週末は来客が多くてリビングが足の踏み場もない状態になった。
On the weekend there were so many guests that the living room had no space to stand.
机の上が散らかっていて、足の踏み場もないくらいだ。
My desk is so messy there's barely any space to set anything down.