“Còn cái nịt” became a widely recognized Vietnamese internet catchphrase after a 2021 viral video associated with Tiến Bịp. In the clip, he humorously discusses whether people would return money they found, suggesting that only an elastic band would remain. The phrase quickly spread through social posts, reaction videos, and short comedy edits. It remains useful because its compact delivery communicates total loss or having nothing left, even when the surrounding joke provides very little setup.