Spontaneous Osteonecrosis of the Knee - SONK. Definition. 1  A condition of unknown aetiology characterized by the development of an area of osteonecrosis on the weight-bearing surface of the medial femoral condyle.  First described by Ahlback in 1968.
Funky Chicken may refer to:  1 Do the Funky Chicken, a 1969 song by Rufus Thomas. 2  The Chicken (dance), a 1960s-era American rhythm and blues dance.  Chicken Dance, an oom-pah song.
It sure is a little peculiar, but we'll have to agree that it's entertaining and highly infectious. Image via The Gregory Brothers. The 'Chicken Attack' video was first uploaded on 25 January by popular YouTubers The Gregory Brothers and has since gone viral on social media. 'Chicken Attack' is part of The Gregory Brothers' Song Voyage series, where they travel the world and produce weird but wonderful music.