Jumping on is a phrasal verb that refers to the act of taking advantage of someone or something in a negative way. It can also mean to hastily join in on an activity or conversation without proper consideration. There are many synonyms for jumping on that can be used to convey a similar meaning, including exploiting, taking advantage of, using, opportunistically engaging in, barging in, intruding, and interfering. These alternatives may be more or less appropriate depending on the context in which they are used. However, they all emphasize the action of appropriating someone or something for personal gain, without regard for the consequences.