Block language is a term used in some grammatical description to refer to the use of abbreviated structures in restricted communicative context, a special application being made of a word or phrase, rather than a clause or sentence. In this paper, I will present a comprehensive theoretical study about block language in English for fourth-year class University students in the Department of English by selecting a random sample of students to have a test in block language, then analyzing the results to point out the difficulty of the Iraqi EFL university students encounter in using block language in English. Because most Iraqi EFL university students often find a problem in using block language because it is one of the types of irregular sentences which do not correspond to regular patterns of sentence structure and the students do not have the mastery of the types of block language in English.