Brandalism is an activist artist collective founded in 2012 in the United Kingdom which engages in subvertising, culture jamming, and protest art. Brandalism uses subvertising to alter and critique corporate advertising by creating parodies or spoofs to replace ads in public areas. The art is typically intended to draw attention to political and social issues such as consumerism and the environment. Advertisements produced by the Brandalism movement are silk screen printed artworks, and may take the form of a new image, or a satirical alteration to an existing image, icon or logo. The advertisements are often pasted over billboards, or propped under the glass of roadside advertising spaces.

Subvertising is the practice of making spoofs or parodies of corporate and political advertisements. The cultural critic Mark Dery coined the term in 1991. Subvertisements are anti-ads that deflect advertising's attempts to turn the people's attention in a given direction. According to author Naomi Klein, subvertising offers a way of speaking back to advertising, ‘forcing a dialogue where before there was only a declaration.’ They may take the form of a new image or an alteration to an existing image or icon, often in a satirical manner.