fifi hook

noun

noun

A small piece of climbing equipment, shaped like a question mark, used principally to connect a climber to gear to take their weight.

Although fifi hooks aren't designed for hooking small edges and flakes, they are very useful for aid climbing.1990, Layne Gerrard, Rock Gear, page 228:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.