(Internet) Initialism of No fucking (freaking) idea; Expresses lack of knowledge on the subject matter / Initialism of no further information. Expresses lack of knowledge on the subject matter

Any of a group of amoeba possessing threadlike pseudopodia.

(mathematics) inequality, inequation

A flag, usually a broad tapering pennant, often with a swallowtail, flown by yachts to identify the owner's yacht club.