using or marked by the use of few words; terse or concise
My friend Brian and I have had a running debate about the connotations of this word for years now (yes, we’re word geeks). I insist that laconic can suggest rudeness, but Brian, who has always thought of himself as laconic, doesn’t accept this meaning. In a usage note for silent, the American Heritage Dictionary says, Laconic denotes terseness or conciseness in expression, but when applied to people it often implies an unwillingness to use words.
The Merriam-Webster Dictionary has this as part of its definition of laconic: concise to the point of seeming rude or mysterious.
I rest my case.