Interrupt two dancers

• What ballroom stags do
• Not wait one's turn
• Was rude at a dance
• Act rudely at the checkout counter
• Interrupt at the prom
• Borrow a partner
• Shoulder-tap a dancer
• Interrupt, as a news broadcast

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