Sentence:  “... Cities aren't like frosted cake — and, anyhow, even the cake didn't keep very well. I tried it, and it dried up, 'specially the <WSD>frosting</WSD>. I reckon the time to take <WSD>frosting</WSD> and good times is while they are going; so I want to see all I can now while I'm here.” 
Meaning of the word marked with <WSD> tags:  A sugary coating for cakes and other baked goods.