'Fighter-esque' describes a song that is a medium tempo heavy dance song. Unlike most songs of this type, however, there's too much music playing at a too slow speed, resulting in lack of harmony, disorderly music and possibly headaches.
Ok listen up. in Korea nowadays, artists are heavily influenced by American music, and there are a million boy bands there (many of them posers). They make music like Americans, but Koreans happen to make a lot of songs that are 'Fighter-esque,' named after the Korean song "Fighter," a pop song with some rock that is meant to be a heavy dance track, which is a bit slower than Usher's song "Yeah" (being technical, "Yeah" is around 102 beats per minute while "Fighter" is around 95). However, imagine if the song "Stacy's Mom" was cut to like 40% of its normal speed while the same 'volume' of music had to come out at that speed. That's what kind of music "Fighter" is.
If this sounds complicated, say music was cars on a highway. "Stacy's Mom" would have a volume of 50 cars (as an example) traveling like 10 meters in say 10 seconds (basically 'light traffic'). By this standard, "Yeah" would be 25 cars traveling 10 meters in 20 seconds, which is still 'light traffic.' However, Fighter would be 50 cars traveling 10 meters in 20 seconds (basically, a big traffic jam). Basically, what I mean is that Fighter-esque songs are in terms of "Stacy's Mom" and "Yeah," Fighter-esque songs will have the volume of sound in "Stacy's Mom" while broadcasting it at the speed of "Yeah."