立錐の余地
Meanings
1
the slightest bit of room; room to stand a gimlet on its end
Almost always used in negative constructions such as 立錐の余地もない or 立錐の余地がない, meaning there is absolutely no room. The literal image is of a space so small that even a gimlet cannot stand upright.
See also: 立錐の余地もない
The venue was so crowded that there wasn't even the slightest bit of room.
His desk is so covered with papers that there isn't room to stand a gimlet on its end.