1) unusual, weird; inappropriate or inaccurate; not functioning properly
2) describing a song that relies on catchy phrases or beats, particularly in hip-hop (sometimes carrying a negative connotation, sometimes positive, sometimes neutral)
3) describing one's style that reflects hip-hop culture, but that is also eccentric or excessive
mike: the back door to the car won't close, so you're going to have to hold it shut with a rope tied around the handle while we drive.
nick: wow, that shit is jiggy
will: that song run by david banner is mad jiggy
tyler: check out these new pink and yellow forces i copped -- they are ill!
graham: i dunno man them shits are pretty jiggy