I shorter term used to define the musical group "The Jonas Brothers"
Normally used as an affectionate term by fans of their music
Possibly coined from the 'Hanna Montana' eppisode when Hanna's father refers to the group as such
person A: "I love the jo-bros!"
person B: "OH I know! Which Bro is your fave?"
person A: "I love all the jo-bros!"
A masturbation partner. Frequently used in personal ads to solicit a partner for mutual manual stimulation ("JO" being standard message-board shorthand for "jack off").
Beat it with a real JO-bro!