fourth point of contact
n.— «I had no problem climbing onto the bed of the truck, since I was ten pounds lighter in my fourth point of contact.…p. 394: The fourth point of contact when performing a parachute landing fall is the buttocks.» —by Richard R. Burns Pathfinder: First In, Last Out Feb. 26, 2002. (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...
In the 15th century, the word respair meant “to have hope again.” Although this word fell out of use, it’s among dozens collected in a new book of soothing vocabulary for troubled times. Plus, baseball slang: If a batter...