This article discusses the findings of a pilot experimental study assessing natural semantic metalanguage (NSM) explications of English interjections, as published in Goddard (2014a), like wow, gosh, gee, yikes (“surprise” group) and yuck, ugh (“disgust” group). The proposed explications receive overall support and further development directions are pointed out. It is interesting that respondents' preexistent cognizance of NSM and other background variables (age, gender, being a native speaker, or studying linguistics) apparently have little impact on the test outcomes.