teeth arm
n.— «Signals is a “teeth” arm (in British parlance)…. To be a Service Commander in Nigeria requires that one have the right type of commission (regular combatant) and belong to a “teeth arm” (i.e. Infantry, Artillery, Armour, Combat Engineers, Intelligence, or Signals).» —“Who is General AO Ogomudia” by Nowa Omoigui Omogui.com Sept. 20, 2004. (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...