moob

A plump or untoned breast on a man.

Vince has Moobs (man boobs = moobs)

2001 September 3, miha ³, "Re: I know I shouldn't be doing this but...", in alt.games.video.nintendo.gamecube, Usenet, Yeah, put a shirt on gene, we don't want to see your fatty moobs.

To rapidly adjust the evaluation of a position towards zero, indicating a likely draw.

Stockfish was slightly moobing until Leela played Qf5. An innocuous looking move that immediately sent alarm bells ringing and Stockfishes^([sic]) evaluation just kept rising.

The time taken for an engine to boom / moob can be quite a while because that time taken is completely dependent on the hardware you're running the program on.

An instance of moobing.

The latest Stockfish on my laptop finds mate in 22 in less than a minute. Do you have any examples where a boom (or moob) occurs after 2-3 minutes of evaluation?

One notable exception to the missing lines being interesting: Sometimes on a moob the sudden insight is 'I'm going to hit the 50 move rule before realizing my advantage'.