Noun
(music) A Greek urban folk song, characterised by lyrics about underworld activity, and played generally on stringed instruments including the bouzouki. [from 20th c.]
(music, in the plural) This style of music; such music as a genre. [from 20th c.]
Source: en.wiktionary.orgRebetiko is admired by many, and as a result rebetadika are often crammed with people of all ages who will sing, dance and drink till dawn. Source: Internet
They settled in poor neighborhoods and brought with them Rebetiko music, making it popular also in Greece, which became later the base for the Laïko music. Source: Internet