Borrow a partner

• Act rudely at the checkout counter
• Interrupt, as a dancer
• Replace a dancer, perhaps
• You might need to do it to dance with the bride
• Interrupt two dancers
• Act rudely on the dance floor
• Tap on the shoulder, maybe
• Interrupt with a shoulder tap
• Act pushy

Wiktionary Word definitions in Wiktionary
n. (context biochemistry English) A waxy polymer of hydroxy acids that is the main constituent of plant cuticle