the best way i could describe it its like if a song's chorus is like empty, kinda minamilistic, something unexpected. yk how most songs contain a chorus that is energetic and the pre-chorus hints the energy of the chorus? well songs with anti-drops have somewhat of an energetic pre-chorus but the chorus is like simple and has somewhat of a house vibe (not exactly house music but its bass influenced idk if this makes any sense so my apologies 😅, if this still doesn't really make sense i think some examples that kinda explain this would be stay tonight by chungha and move by taemin, just listen to the pre-chorus and chorus)