LGTM
acronymprogrammingops culture
Stands for: looks good to me
The code-review approval stamp: looks good to me.
LGTM is how a reviewer signs off a change, and entire review tools adopted it as the approval keyword. It also names the failure mode: a rubber-stamp LGTM on a thousand-line diff means nobody actually read it. The two-character review is both the grease of high-velocity teams and the epitaph on many an incident postmortem.