This article focuses on the Boycott, Divestment, and Sanctions (BDS) movement's utilization of ‘fluidity,’ conceptualized as the ability to adapt campaign tactics to multiple arenas and political opportunity structures simultaneously. Framing BDS as both a social movement and a transnational advocacy network, it demonstrates the movement's fluidity in the context of three campaigns: the campaign at the 65th FIFA (Federation Internationale de Football Association) congress in 2015, which illustrates an ‘outsider’ strategy aimed at intergovernmental institutions; the 2014 Olive Declaration of municipalities endorsing BDS, which illustrates how local ‘insider’ campaigns can combine to create a translocal campaign; and the ‘Ferguson-Gaza moment’ in 2014, which illustrates how movements can engage at the level of civil society and embed themselves in the broader global justice movement.