”Boy, you should just shut your mouth; you're diggin' a hole!”

 kazukazu88 Retweeted

From the Dutch newspapers pic.twitter.com/7q0NCAKTqE

— stevenweeven (@parksielegend) October 17, 2021

dig a well　でイディオムなのかと思ってみても特にない。

dig a hole なんだね

To get oneself into a difficult, undesirable, or disadvantageous position.

to continue to make a situation go from bad to worse