Soldier Ant 

So during a casual conversation with my wife this afternoon, I realized that grok may be the quintessential 'nerd tell' of all time: anyone who uses it probably works in the technology industry, and I've never heard it used casually in the culture at large. (Unlike, say, 'parse' which I've heard creep into the common lingo here and there.) Grok is like our nerdy Masonic handshake.