Types of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. 1  Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.
System of a Down's music has variously been termed alternative metal, nu metal, hard rock, progressive metal, thrash metal, art rock and avant-garde metal.
Garage - Genre of music that grime developed from. Garage didn't become grime (it still exists), grime was just an offshoot. Clash - Effectively a battle. Soundboy - Competitors in a sound clash. Slew - To ruin someone, to go against/diss someone (Early grime is packed full of crews and MCs going against each other on tracks)