Does the idea of walking up to people and tonking them with a massive weapon sound appealing? Does the idea of said weapon potentially crippling them on hit sound even more appealing?
Oh, and would you like to have this weapon in Fallout 4? Yes? Good. Let's explore, then.
It's called the Big Jim, and it's a unique melee weapon that you can find at Walden Pond. It's near the Sunshine Tidings Co-op and it's pretty easy to miss, which is a shame because it's quite the nutcracker (literally).
It weighs 2 units, does 21 damage and has medium attack speed, and if you don't know where to find it then YouTuber KackisHD has a short video guide showing you where to go.
Big Jim, incidentally, was also referenced in Fallout: New Vegas and went on a journey with his little brother to send a message to the Powder gangers on behalf of Nipton. He never survived, however, although Little Jim made sure the message got through.