That Time It Rained for Two Million Years

How Come makes you sound smarter, i guess

Uuuugh, that's a phrase that I've never thought about before, it's just always been in my lexicon since I've always heard it. BUT, after it just being pointed out, "how come?" is damn cringeworthy!!! Those two words together don't make any sense without the full "how did it come to that" phrasing. It's nonsensical gibberish, or it should be without our ingrained knowledge of what it's come to mean.
Shit. That's buried deep in my vocab as well. This'll be something that annoys me each time I catch myself saying it now. "Why?" serves the purpose in such a simpler manner that you have to wonder how "how come" ever even became an ingrained/accepted slang.

Interesting. I actually went to Google before I read the article. Once I did, I had to post the results. Draw your own conclusions I guess. Based on Merriam-Webster's take, it's not really that bad a phrase:

How Come People Say 'How Come'?