Definition of "offhand"

offhand

/ˌɔfˈhænd/

adjective
comparative more offhand, superlative most offhand
1. Without planning or thinking ahead.
  Quotations
  He must also be fluent in obscenity, offhand in sex. Most important of all, he must play tough.
  1976 June 7, Nik Cohn, “Inside the Tribal Rites of the New Saturday Night”, in New York Magazine‎
2. Careless; without sufficient thought or consideration.
3. Curt, abrupt, unfriendly.
adverb
comparative more offhand, superlative most offhand
1. Right away, immediately, without thinking about it.
  Quotations
  We will have no more of this shilly-shallying! Call the Archbishop, and let the Prince and Princess be married offhand!
  1854, William Makepeace Thackeray, The Rose and the Ring
2. In an offhand (adjective) manner.