It's a term that means approximately "obsessively-masturbating neckbeard". The tweet is derisively saying that pcwalton's focus on safety is equivalent to mastu

It's a term that means approximately "obsessively-masturbating neckbeard". The tweet is derisively saying that pcwalton's focus on safety is equivalent to masturbation. https://www.urbandictionary.com/define.php?term=Coomer https://www.urbandictionary.com/define.php?term=Coomer Whether one agrees with Zig's approach or not, it'd be pretty reasonable to say "Zig doesn't focus on this sort of thing". However, I'd go so far as to say that any language community that has a prominent person slinging aggressive insults like this is one to avoid.