retro (ˈrɛtrəʊ
,
pl -ros
1. prefix meaning "backwards, behind," from L. retro (prep.) "backward, back, behind," probably originally the ablative form of *reteros, based on re- "back." Common in combinations in post-classical Latin.
—
adj 2. denoting something associated with or revived from the past:
retro dressing ;
retro fashion
Basically i'm saying he's talking about something that's old. It's only from a couple days ago, which I suppose was part of the humor of it...but If I have to explain it, it losses a lot of what I found humorous about to begin with, not to mention that fact that it wasn't really all that funny to begin with I guess...
You KILLED my joke.