Glasgow kiss
n.β Β«Compared with its great rival, Edinburghβthe twee Scottish capital thatβs only a 45-minute drive awayβthe city has progressed from being the spiritual home of the head butt (also known as the “Glasgow kiss”) into a vibrant, trendsetting hub.Β» ββGlasgowβs new glow” by John Lee in Glasgow, Scotland Globe and Mail (Toronto, Can.) Apr. 23, 2005. (source: Double-Tongued Dictionary)