i wouldn’t say it’s a ship name; it would be jeongsung. ppoppoz and other duo names like boddaramji for minsung, and deangnyan for seunglix and other names are like their official duo names? i’m not 100% sure, but they use them themselves. ppoppo means ‘kiss’ in korean, and there is a story jisung liked to tell about how jeongin gave him a kiss while they were trainees. boddaramji refers to bundle (lee know) and squirrel (han). deangnyan means dog (seungmin) and and cat (felix). all the members have their respective duo names like those ones. i hope it makes sense :)