The term 'EXTREMELY, SLANGILY' can be expressed in three different ways using crossword solutions. The first is UBER, a four letter word which is derived from the German word 'über', meaning 'OVER' or 'ABOVE'. It is used to describe something that is of the highest quality or degree. The second is HELLA, a five letter word which is derived from the phrase 'hell of a lot' and is used to emphasize the extreme nature of something. The third is MONDO, a five letter word which is derived from the Italian word 'mondo' meaning 'world' and is used to describe something that is very large or impressive. All three words are slang terms used to express something that is extremely great or impressive.