What does "old pot mouth" mean in orchid terminology?

"Old pot mouth" refers to a plant that has already been potted for some time and has recovered from transplanting. The root system of such a plant has generally recovered, and in older cases roots have grown out of the drainage hole at the bottom of the pot, showing a certain ability to adapt to the new growing environment. 1: An orchid that has not been repotted for many years, 2: An orchid grown using natural, unforced methods.