Problem: The Nigerian Pidgin English that was seen as a low prestige and corrupted language has regained its strengths among the university students in Nigeria. Precisely, the Nigerian English lexicons differ among users in different regions in Nigeira. The study investigates Naija English lexicons among the University of Nigeria, Nsukka (UNN) undergraduates as a world English dialect. The major objective of the study is to identify, examine and exemplify the Naija lexicons used among UNN students. Method: This study uses a descriptive survey design and also uses random sampling method to elucidate information from 220 students. Among these sampled population, the study uses 120 female undergraduates and 100 male undergraduates. This study also uses tables, simple percentage and frequency to validate the sampled population. Five variables are used to ascertain the responses for research question one. The study finds out that Nigerian English exists among the UNN undergraduates and its building blocks lies on Naija lexicons.