expression, suffix
... or something; so-called ...; a certain ...
Attaches to a noun or quoted phrase to express uncertainty or vagueness about the referent, similar to '... or something (like that)' or 'a certain ...'. Often used when the speaker is unsure of the exact name or details.
See also: やら
田中さんとやらに会った。
I met a certain Mr. Tanaka (or someone like that).
彼は「新しいプロジェクト」とやらで忙しいらしい。
He seems busy with some 'new project' or whatever.