Hey, pass me that crowbar, please.
Sure... y’know, before the crowbar was invented, crows had to drink at home.
Okay, so listen up, smarty pants. You see, a "crowbar" is a tool, but it sounds like "crow bar," as in a bar for crows. The joke is that before the tool was invented, crows had to drink at home because they didn't have a crow bar to go to. And you, my friend, probably still don't get it, do you?