The 'LGTM' meme, short for 'Looks Good To Me,' is a staple of software engineering culture, specifically within the context of GitHub Pull Requests and code reviews. While originally a functional acronym for approving peer work, it morphed into a meme representing the superficial or rushed approval of potentially disastrous code. It often features imagery of someone giving a thumbs-up while ignoring blatant errors or chaos in the background. The meme resonates with developers because it highlights the irony of the peer review process where complex changes are sometimes waved through with a simple 'LGTM' despite no actual testing or thorough investigation taking place.