绝绝子 is playful, exaggerated praise for something that deserves an immediate reaction. It fits comments and chats about food, outfits, performances, and delightfully specific little wins.
Specificity keeps it alive. 绝绝子 after generic competence sounds like filler; a homemade birthday cake whose cramped inscription becomes 祝我少加班 gives the praise a reveal. The expression is strongly casual and internet-marked, so simpler praise such as 不错 or 很厉害 travels better in formal settings.
