1. To combine people or things at random. A noun or pronoun can be used between "jumble" and "together." You can't just jumble everyone in the family together at Thanksgiving dinner—a lot of them don't get along. I hadn't been expecting company, so I jumbled together some snacks for the kids and hoped for the best.
2. To construct something shoddily. Yikes, this old car sounds like it was just jumbled together by the mechanic.
jumble someone or something together
to mix people or things together randomly into a hodgepodge. They just jumbled everything together and made a real mess. The army just jumbled everybody together, no matter what their skills and talents were.
jumble something together
to assemble something clumsily and hastily. They just jumbled some holiday decorations together. It really wasn't very well done. I hope this airplane wasn't jumbled together as badly as this meal.