When did being 'a thing' become 'a thing'?

[awfullyproper]

?

[TipBoov]

?

[TheNaze73]

WTAF are you asking?

[TamaraHiddlestoned]

When did people become so uncertain about whatever was going on, that they needed to get confirmation from others that it was alright to be / feel / look like that.

[AdelindSchade]

Within the last ten years is my feeling.

[awfullyproper]

I feel like I only heard it recently. You know when someone says something is 'a thing'