Autistic people may camouflage their innate autistic social behaviours to adapt to, cope within and/or influence the predominately neurotypical social landscape. This study describes behaviours exhibited, altered or avoided by autistic adults whilst camouflaging (i.e. camouflaging behaviours). Using Interpersonal Process Recall methodology, 17 autistic adults (8 women, 6 men and 3 agender/gender neutral individuals) participated in a brief social task designed to replicate a common day-to-day social situation. Participants then watched a video of their interaction with a researcher, actively identifying and describing camouflaging behaviours. Using qualitative content analysis, descriptions of 38 camouflaging behaviours described by participants were clustered into four main categories and seven subcategories: (1) masking, (2) innocuous engagement (subcategories: passive encouragement, centring social partner, deferential engagement and reducing social risk), (3) modelling neurotypical communication and (4) active self-presentation (subcategories: reciprocal social behaviours, risky social behaviours, and comfortable and familiar social behaviours). The novel use of Interpersonal Process Recall methodology addressed limitations in existing camouflaging research and facilitated the identification of previously unreported camouflaging behaviours. These camouflaging behaviours are discussed with reference to literature concerning interpersonal research and theory within and outside the field of autism.