In Martineau’s seminal chapter on the social functions of humor, he postulated some of the ways in which disparagement humor shapes social behavior. This research paper discusses three research studies that compared the effects of other-deprecating humor and self-deprecating humor on the observer and examines how they relate to Martineau’s theory. In our research, we hypothesized that people who observe ridicule of others experience “jeer pressure.” This inhibiting effect on behavior was expected to result in conformity to others’ opinions, fear about failing or standing out, and conventional thinking. In the first two studies, participants observed videotapes containing self-ridiculing humor, other-deprecating humor, or non-ridiculing/no humor. Participants then completed tasks assessing conforming, fear of failure, and creativity. Results of both studies showed that participants who observed ridicule of others were more conforming and more afraid of failing than participants who observed self-deprecating humor or the control condition. Study 3 examined the effects of ridicule of others versus self-deprecating humor on creativity using a more sophisticated creativity measure, and less caustic humor. Results supported the hypothesis that observing self-deprecating humor would result in higher levels of creativity compared to the other-ridicule condition. Implications of these findings for Martineau’s model are discussed.