Guy 1: Man, when my momwoke me up that day to goto school, she turned on all the lights in the world and all i could say was "singa-dungoo"
Guy 2: haha
Usually used in Cubanslang to refer to someone with a bad reputation, characterised for having a nasty attitude towards others or practice and support immoral behaviours. When used with the word ‘perro’ before the word denotes a high degree or superlative of the above-mentioned in addition to cruelty and lack of dignity.