gaspump

So I was going as Adam from Adam and Eve for a costume party. 

I went to a costume shop and asked the lady working there for a leaf to wear, so the lady brought out a leaf and I said, "bigger", so the lady brought out another leaf and I said "bigger" again.   

This went on a few more times and the lady finally came out and said, 

"Why don't you just throw it over your shoulder and go as a gas pump?"