This monograph explores the diverse sociopragmatic functions and meanings of humorous discourse in various online contexts affecting its use. To this end, an analytical model is proposed which takes into consideration the aspects of context which are relevant to the production and reception of humor, and hence to its sociopragmatic analysis. The model is employed for addressing research questions such as the following: Why may an utterance/text be intended and perceived as humorous by some speakers and fail for others? How and why may speakers attempt to regulate language use through humor? Why and how may the same humorous utterance/text engender diverse and contradictory interpretations? How do speakers create social groups and project social identities through humor? How could the sociopragmatic analysis of humor form the basis for teaching about humor within a critical literacy framework?