Glasgow nod
n.— «One is why the French captain chose the headbutt line of attack commonly known as the Glasgow Nod (or Kiss) instead of simply lashing out with a fist, as you might have expected.» —“Assault and buttery” The Mercury (Durban, South Africa) July 17, 2006. (source: Double-Tongued Dictionary)
Further reading
If someone urges you to spill the tea, they probably don’t want you tipping over a hot beverage. Originally, the tea here was the letter T, as in “truth.” To spill the T means to “pass along truthful information.” Plus...
When you had sleepovers as a child, what did you call the makeshift beds you made on the floor? In some places, you call those bedclothes and blankets a pallet. This word comes from an old term for “straw.” And: What’s the story...