〜とか
things like, … or something
Noun / plain form + とか (+ Noun / plain form + とか)
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とか gives examples, like や: 映画とか音楽とか, "films, music, that sort of thing". It's casual, and very common in speech.
Unlike や, it can follow verbs and whole phrases: 掃除するとか、買い物に行くとか, "cleaning, going shopping, stuff like that".
On its own it softens a suggestion or a statement, much like "or something": 先生に聞くとかしたらどう?, "why not ask the teacher or something?"
The last item can take とか too, and often does in conversation. In careful or formal writing, stick to や and など instead.
Register: Casual. や and など are the neutral equivalents.
Examples
休みの日は映画とかを見ます。
On my days off I watch films and things.
りんごとかみかんとかが好きです。
I like things like apples and mandarins.
週末は掃除するとか、買い物に行くとか、いろいろしました。
At the weekend I did stuff like cleaning and shopping.
分からなかったら、先生に聞くとかしたらどう?
If you don't get it, why not ask the teacher or something?
田中さんとか、山田さんとかが来ました。
People like Tanaka and Yamada came.