To exercise for physical fitness.

A sheet tailored to form pocket for a mattress with elastic edges that is suitable for a range of mattress sizes. The edge may also contain a drawstring to secure the sheet more firmly and enable use on a wider range of mattress thicknesses.

plural of fitted sheet

(colloquial, US) A fit of bad temper; a tantrum.

(of clothing) Snug, tight, form-fitting.

(bodybuilding) A good-looking person (usually a man) with a well-developed physique who is paid as a model to demonstrate exercises or related equipment.

Alternative spelling of retrofitted

Alternative form of fitout.

(US) A cap that is not elasticated or adjustable at the back.

(simile, colloquial, Tyneside) In good health; very fit.