单挑群挑只为瞬间荣耀
[dān tiăo qún tiăo zhĭ wéi shùn jiān róng yào]
The user who uses this nickname probably participates in solo or group challenges only for momentary glory. Here, 'solo challenge (single)' refers to taking on all comers one-on-one; 'group challenge' means fighting multiple opponents at once. 'For a fleeting glory' suggests that the person values winning glory even if briefly.