This study compared the results of Lee Deok-bae (2014) and the present (2020) on the usage of ‘Gao’ or ‘Gaojabda’ between generations. After comparing the usage pattern of general public in the media with that of high school students and college students, the time concept between generations and the ambiguous boundaries of semantic qualities that exist between time made a difference in the usage of language. The elaboration of metaphorical use of glorification, exaggeration and avoidance was progressing.
Comparing the frequency of use of ‘Gao’ or ‘Gaojabda’ with Lee Duk-bae (2014) and this study (2020), Lee Duk-bae (2014) has a response rate of 45% (23 respondents) on “sometimes/often used” and this study (2020) has 100% (51 respondents) on “have used it before”. The reason why the frequency of use of ‘Gaojabda’ among high school students and college students increased in 2020 compared to 2014 is that the acceptance of language use has increased as ‘Gao’ has been exposed more through media in the arts and cultural sector and by the social leaders.
Analysing the usage pattern of ‘Gaojabda’ in terms of time concept between generations, high school students use “gaojabda,” a term that means “pretend” and connotes a negative attitude toward the exaggerated behavior of others. College students in their twenties added meaning of ‘pretend to be strong’ in ‘pretend’ used by high school students, and started to use the meanings of ‘face, appearance, cool and Bonsae’, which are the dictionary definition of ‘Gao’. This finding suggests that two different semantic features coexist in the usage of ‘Gao’ among people in their twenties. People in their twenties use both exaggerated slang metaphors used by high school students and general metaphors such as glorification and avoidance of shame used by the general public. The meaning and usage patterns of ‘Gaojabda’ are different between generations, in other words in time concept, but it is found that 'Gaojabda' is used metaphorically by finding alternative expressions derived from its base meaning.