This document provides an introduction to Weird International Relations (IR), which examines deviant or puzzling cases in international relations that cannot be easily explained by existing IR theories. Weird IR cases are supposed to be laughable due to their bizarre nature. The document then gives overviews of three schools of thought in IR - realism, liberalism, and constructivism - and provides examples of each. Realism sees states as rational actors focused on survival and power, liberalism emphasizes cooperation and non-state actors, and constructivism views identities and social norms as determining international structures.