The term 'DERISION EXCLAMATION' is composed of two words, 'DERISION' and 'EXCLAMATION'. DERISION is a noun that means the act of mocking or ridiculing someone or something. An EXCLAMATION is an interjection used to express strong emotion or surprise. The crossword solutions for this term are 'YAH' (3 letters) and 'JEER' (4 letters). 'YAH' is an EXCLAMATION of joy, triumph, or excitement, while 'JEER' is a verb meaning to mock or ridicule someone or something. Therefore, the term 'DERISION EXCLAMATION' can be defined as the act of mocking or ridiculing someone or something with an expression of joy, triumph, or excitement.