Brexit has opened doors for renewed attention to contested, multi-scalar geopolitical forces grounded in everyday life in borderlands. In this paper, we aim to unravel 'everyday Brexits' in the Gibraltar-La Línea (Spain) borderlands. By studying the 2019 commemoration of the historic 1969 border closure, we concentrate on how local borderwork by residents is mobilised for bottom-up geopolitics in the context of Brexit negotiations. We use a conceptual approach that focuses on multiple layerings of the border and the selectivity of stakeholders to select among these layers to pursue their interests. Based on on-site observations, in-depth interviews, and informal conversations with residents and key actors of La Línea and Gibraltar, we argue that Brexit has increased the tension of already loaded core-periphery relations in Spain. Brexit does not represent a sudden disruption. Rather, we show how Brexit allowed the bottom-up geopolitical mobilisation of latent, strongly historically embedded and continuous cross-borders sentiments of residents. This mobilisation could potentially challenge local cross-border power relations. In the final analysis, we conclude that the bottom-up geopolitics of 'ordinary' residents through everyday bordering processes is central to geopolitics research, including with regard to Brexit and in particular for non-British geographies affected by Brexit.