Gangsta rap is a subgenre of hip hop music that evolved from hardcore hip hop and purports to reflect urban crime and the violent lifestyles of inner-city youths. Lyrics in gangsta rap have varied from accurate reflections to fictionalized accounts.Gangsta is a non-rhotic pronunciation of the word gangster. The genre was pioneered in the mid-1980s by rappers such as Schoolly D and Ice-T, and was popularized in the later part of the 1980s by groups like N.W.A. After the national attention that Ice-T and N.W.A attracted in the late 1980s and early 1990s, gangsta rap became the most commercially lucrative subgenre of hip hop. Some gangsta rappers have been associated, or allegedly have ties with the Bloods or Crips gangs.

The subject matter inherent in gangsta rap has caused a great deal of controversy. Criticism has come from both left wing and right wing commentators, and religious leaders, who have accused the genre of promoting crime, violence, profanity, sex, homophobia, racism, promiscuity, misogyny, rape, street gangs, drive-by shootings, vandalism, thievery, drug dealing, alcohol abuse, substance abuse and materialism.

Ice cubes are small, roughly cube-shaped pieces of ice, conventionally used to cool beverages. Ice cubes are sometimes preferred over crushed ice because they melt more slowly; they are standard in mixed drinks that call for ice, in which case the drink is said to be "on the rocks."

Ice cubes that are crushed or sheared into irregularly-shaped flakes may add an interesting aesthetic effect to some cocktails. Crushed ice is also used when faster cooling is desired, since the rate of cooling is governed by the number and average radius of the ice particles.

Melting ice cubes sometimes precipitate white flakes, commonly known as "floaties". This is calcium carbonate which is present in many water supplies and is completely harmless.^{[citation needed]}

American physician and humanitarian John Gorrie built a refrigerator in 1844 with the purpose of cooling air. His refrigerator produced ice which he hung from the ceiling in a basin. Gorrie can be considered the creator of ice cubes, but his aim was not to cool drinks: he used the ice to lower the ambient room temperature. During his time, a dominant idea was that bad air quality caused disease. Therefore, in order to help treat sickness, he pushed for the draining of swamps and the cooling of sickrooms.