Sentence:  Again—we stopped to get something to eat. I got a <WSD>thickshake</WSD> and some hot chips but only managed to eat one chip and was lucky if I took a sip of the <WSD>thickshake</WSD> —I was beginning to feel worse and worse. 
Meaning of the word marked with <WSD> tags:  A beverage consisting of milk and ice cream mixed together, often with other flavorings as well.