touch bottom
Reach the lowest point, as in During the recession the economists kept saying that we hadn't touched bottom yet. This metaphor for reaching the ground under a body of water has been used since the mid-1800s.
Words nearby touch bottom
toucan,
toucanet,
touch,
touch and go,
touch base with,
touch bottom,
touch down,
touch football,
touch judge,
touch off,
touch on