This study conducts a dispositive analysis along with a cognitive semiotic analysis of a corpus of Arabic humorous texts on Facebook that tackle a variety of social, educational, economic, and political issues in Egypt or abroad. The selected data is analyzed using Jager's (2001) dispositive model, Fauconnier and Turner's (2002) conceptual blending theory, and the incongruity theory of humor. Some major notions such as speech acts, and instances of visual metaphor are also utilized. The findings reveal that dispositive analysis has the advantage of heterogeneity over discourse analysis as it embraces not just language, but also actions and objects. Besides, the interplay between the dispositive triangle's heterogeneous elements is essential to enable the reader to fully understand the text. Moreover, the blending between the caption and the image in the humorous text gives birth to a new meaning, and blending is the basic mental and cognitive operation that readers use to completely apprehend the text. Furthermore, incongruity is an essential factor in arousing humor in these humorous texts.