This paper presents the preliminary results of an ongoing study on the diachronic and synchronic use of multiword expressions (MWEs) in Egyptian, begun when I joined the COST Action Universality, Diversity and Idiosyncrasy in Language Technology (UniDive, CA21167). It analyzes, as a case study, Old Egyptian body part MWEs based on lexicographic and textual resources, and its aim is both to open up a research line in Egyptology, where the study of MWEs has been neglected, and to contribute to Natural Language Processing studies by determining the rules governing the morpho-syntactic formation of Old Egyptian body part MWEs in order to facilitate the identification of other types of MWEs.