A meddlesome person gets in your business in a way that's totally annoying. In other words, they meddle. Respect people's privacy by not being meddlesome.

meddlesome /ˈmɛd^əlsəm/adj

1. intrusive or meddling

ˈmeddlesomelyadvˈmeddlesomenessmeddle /ˈmɛd^əl/

vb (intransitive)

1. (usually followed by with) to interfere officiously or annoyingly
2. (usually followed by in) to involve oneself unwarrantedly

Etymology: 14th Century: from Old French medler, ultimately from Latinmiscēre to mix

ˈmeddlernˈmeddlingadj