Have it off is a colloquial phrase that is often associated with sexual activity or intercourse. It is not typically used in formal conversation due to its casual and informal nature. Please note that it is also a regional idiom, more commonly used in British English.

shrub or small tree of southwestern United States and northwestern Mexico having spirally twisted pods

tropical Asian plant widely cultivated for its pungent root; source of gingerroot and powdered ginger

presence of excess lipids in the blood

hard strong durable yellowish-brown wood of teak trees; resistant to insects and to warping; used for furniture and in shipbuilding

a battle in 1513; the English defeated the invading Scots and James IV was killed