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
Book recommendations and the art of apology. Martha and Grant share some good reads, including an opinionated romp through English grammar, a Spanish-language adventure novel, an account of 19th-century dictionary wars, and a gorgeously illustrated...
If you speak both German and Spanish, you may find yourself reaching for a German word instead of a Spanish one, and vice versa. This puzzling experience is so common among polyglots that linguists have a name for it. • The best writers create...