What metaphors are used in Look Back in Anger by John Osborne?

"People like me don't get fat. I've tried to tell you before. We just burn everything up."

The word "burn" has a double meaning in this way; on the one hand it is meant to represent a burning of physical, bodily energy. On the other hand, it is meant to convey destruction -- how Jimmy's frenetic quest for real life destroys the lives of those to whom he is closest.