What's the meaning of "lack of break"?

I saw this expression in the lyrics of hair

and didn't get. Any help.

Ps.: I'm learning english and some expressions are hard to find.

What's the meaning of "lack of break"?

When I have cleaned the house, played with the kids, cooked 3 meals and 2 snacks, bathed kids, fed and walked dogs, done 6 loads of laundry

Go to bed, wake up, and repeat!