Offhand a. : Instant; ready; extemporaneous; as, an offhand speech; offhand excuses.

Offhand adv. : In an offhand manner; as, he replied offhand.

Example:
How do I equip something Offhand in world of warcraft?

Taxonomy
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Defination from the web:
offhand from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... without premeditation or preparation : extempore <couldn't give the figures offhand> Learn more about "offhand" with Google Search: Custom Search ...