hasty

hasty

adjective.  speedy, quick

Note that hasty, unlike fast, has negative connotations. If someone accuses you of having completed an assignment in a hasty fashion, it means your work appears careless.

hasty pudding is a dessert that only takes a short amount of time to make
“hasty marriage seldom proveth well"- Shakespeare
"let's not be hasty in our judgement"

http://www.vocabulary.com/dictionary/hasty