While "kachka" literally means "pitching" or "rolling" (like a ship at sea), in Russian internet slang, it is a pun on the word kachat (качать), which means "to download."
Short clips of music formatted specifically for mobile phones. kachka mp3 skachat
Russian rap and club music often tagged with the site's name in the metadata. While "kachka" literally means "pitching" or "rolling" (like