You know, it's going to get harder, and harder, and harder
As you get older
Yeah, and in the end you'll pack up and fly down south
Hide your head in the sand

from Pink Floyd – Dogs Lyrics on Rap Genius

Meaning

The older you get, the harder it’s going to be to keep up the game of using and being used, and you'l eventually retire and move somewhere Southern and warm like Florida.

To help improve the meaning of these lyrics, visit “Dogs” by Pink Floyd Lyrics and leave a comment on the lyrics box