Originally a line from a Vine.

It now usually refers to straight people ignorantly misinterpreting gay/lesbian situations.
Person1: I saw a picture of Jim and John holding each other lovingly on Facebook, they must be good friends.

Person2: “and they were roommates
by Caesar’s Femboy October 18, 2020
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is an iconic vine and it should be known world wide
*Girl walking down the street on her phone*: and they were roommates
guy: omg they were roommates
by Bubbalicious November 18, 2018
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