Sentence:  Is there a best way to end a comedy sketch? Endings — or outs, or <WSD>buttons</WSD> as writers call them — are notoriously difficult to nail. The ideal ending needs to be satisfying and surprising while staying true to the comedic game that preceded it. 
Meaning of the word marked with <WSD> tags:  The final joke at the end of a comedic act (such as a sketch, set, or scene).