Sentence:  The wig's the thing, the wig, the wig, / Be of the ton a natty sprig, / The thing, the <WSD>tippy</WSD> and the twig, / Nor heed who are the truly wise, / For after all, in vulgar eyes, / The wisdom's in the wig. 
Meaning of the word marked with <WSD> tags:  In the height of fashion, excellent, cool.