In situations with rival groups, people strategically use language to strengthen group identity and foster intergroup competition. We distinguished 2 communication mechanisms to accomplish this: (a) linguistic aggression toward out-group members, (b) communicating group expectancies. We contrasted these mechanisms across 2 experiments by studying verbal irony. Experiment 1 targeted speaker behavior and showed that Dutch soccer fans found irony more appropriate to comment on out-group (vs. in-group) members, regardless of behavioral valence. Experiment 2 demonstrated differential inferences from irony by neutral observers: Fans using ironic comments about competent (vs. incompetent) behavior were seen more as out-group and less as in-group members. Our experiments demonstrated a communication asymmetry between speaker behavior and addressee inferences.