In the current study, 34 nine graders in a Swedish school were given a test where they would interpret sarcastic and ironic utterances from the American series Modern Family by explaining the implication in their own words. They were also asked to assess their own knowledge of English by filling out a questionnaire containing both qualitative and quantitative questions. The aims were to investigate whether the students understood the implications and if the total score could be connected to their own perception of their level of proficiency. The results show that although plenty of the students assessed themselves being highly comfortable with English as a foreign language, it did not result in a high understanding of sarcastic and ironic utterances. Out of 646 possible points, the students only reached a score of 156 in total. It was also clear that their self assessments did not comply with their results. While confident students received low scores, insecure students did well on the test.