I can't believe I'd never thought to look up what grep stood for, or if I had it had failed totally to make an impression on me. But it doesn't even make any obvious sense - "global regular expression print"??
OTOH "git" doesn't stand for anything. "Cat" is rarely used to concatenate, "awk" you'd never guess unless you looked it up, "perl"'s status as an acronym is purely apocryphal etc. etc.
When I think of programming things I use the most, most of them have whimsical names that mean nothing.
I mean, say, “grep” means… something with regular expressions I guess? But nobody cares. It’s just “grep”.