Glasgow kiss
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
A Francophone who’s feeling low might say so with J’ai le moral dans les chaussettes. The idiom avoir le moral dans les chaussettes means “to have morale in your socks.” This is part of a complete episode.
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