If the title of this post made perfect sense to you, then you’re way ahead of me. But just in case, we’d best recap. Neal Whitman wrote a good article at Grammar Girl recently on the possible origins of because as a standalone preposition. This helpful passage from Whitman sets out the context:
In Standard English, the word “because” can be used two ways. One of them is to introduce a clause, as in “Aardvark was late because he was waiting for the repairman to show up.” Used this way, “because” is a subordinating conjunction. The other is to team up with “of” to form what’s called a compound preposition. For example, “Aardvark was late because of heavy traffic.” In the past three or four years, though, a new usage for “because” has been developing.
The new usage – older than 3–4 years, mind – is what Laura Bailey and Mark Liberman, respectively, have referred to as “because+noun” and “because NOUN”. Liberman says the idiom usually seems to imply “that the referenced line of reasoning is weak”. Sometimes, yes, but it’s also commonly used just for convenience, or effect: No work tomorrow because holidays!; Of course evolution is true, because science.
Because X is fashionably slangy at the moment, diffusing rapidly across communities. It has a snappy, jocular feel, with a syntactic jolt that allows long explanations to be forgone. Because time-strapped. Maybe the causal factor is so obvious as to need no elaboration, or the speaker is distracted or giddy, or online and eager to save effort and move on, or maybe the construction appeals for undefined aesthetic or social reasons.
Gretchen McCulloch, at All Things Linguistic, points out that there seem to be restrictions on what kind of noun phrases can occur here. Providing examples of what works and doesn’t work for her (e.g., Yes to: I can’t come out tonight because homework/essays; No to: I can’t come out tonight because lots of homework/this essay), she concludes:
it seems like the because+noun construction really must consist of a bare noun, not a noun with a determiner or an adjective. However, I think I might be able to be okay with:
? I can never get to bed at a reasonable hour because interesting people on the internet!
With new usages, as with old ones, what works or doesn’t varies from person to person. Bare nouns certainly seem more common in the X slot, and tend to carry more emphasis, but I’ve seen longer noun phrases, and other classes of words, used too; there are examples below.
The construction is more versatile than “because+noun” suggests. Prepositional because can be yoked to verbs (Can’t talk now because cooking), adjectives (making up examples because lazy), interjections (Because yay!), and maybe adverbs too, though in strings like Because honestly., the adverb is functioning more as an exclamation. The resulting phrases are all similarly succinct and expressive.
Here are some examples from Twitter, categorised by grammatical class:
Nouns, noun phrases, proper nouns: