(slang, computing) A rogue system administrator who abuses users of the system.

(construction) A small, disposable aerosol can containing spray polyurethane foam (SPF) components.

(idiomatic) To change from a negative to a positive outcome; to improve one's fortunes significantly. / (idiomatic) To become very popular after being unpopular.

Engine layout in motor vehicles where only the front wheels are driven.

(uncountable) The medical disorder adhesive capsulitis. / (countable) A person's shoulder affected by this disorder.

plural of Frobenius number

For a given set of coprime positive integers, the greatest integer that cannot be expressed as a linear combination (with nonnegative integer coefficients) of its elements.

Alternative spelling of front line

plural of front line

Alternative form of from the get-go