The term 'EXTREMELY, IN SLANG' can be expressed in three different ways. The first is 'MONDO', which is an Italian word meaning 'VERY' or 'GREAT'. The second is 'UBER', which is a German word meaning 'OVER' or 'ABOVE'. The third is 'HELLA', which is a slang term originating from Northern California and is used to mean 'VERY' or 'REALLY'. All three terms are used to express the idea of something being extremely or VERY intense.