teeth arm
n.— «The six main “teeth” arm units were augmented by soldiers from 10 other regiments. The commander of 7th Armoured Brigade, who is a 5th Inniskilling Dragoon Guard, had his tank manned by men from his own regiment.» —“Army’s System No Longer Suited To Today’s Battlefields” Independent (U.K.) June 10, 1991. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...