うぽつ

Japanese

Etymology

Abbreviation of うp乙 (upu-otsu). Popular on Niconico Video since 2011 ([1]), although it is from before then.

Phrase

うぽつ • (upotsu) 

1. (Internet slang) Thank uploader for uploading the video.

Usage notes

The term of gratitude is often seen in danmaku at the beginning of a video on websites such as Niconico Video.