I enjoy boxing but wouldn't miss it if it dropped off the face of the earth tomorrow.
Usage notes: most often used with the verbs drop, disappear, and wipe
off the face of the earth
1. Completely gone; vanished without a trace. Jen was the biggest social butterfly I knew, but then one day it seemed like she just dropped off the face of the earth.
2. Totally eradicated; destroyed with nothing remaining. I've vowed to wipe these terrorist scumbags off the face of the earth.