Meme: "timey-wimey."
Originator: TBD (Possibly Keen in this answer from June 7, 2011.)
Cultural Height: Still going strong.
Background: Based on a quote from the Doctor Who episode "Blink."
"People assume that time is a strict progression of cause to effect, but actually — from a non-linear, non-subjective viewpoint — it's more like a big ball of wibbly-wobbly... timey-wimey... stuff." — The Tenth Doctor
This phrase, or some variation of it, is often used in response to questions related to Doctor Who or time travel in general.
It is similar to the meme "Because, Magic" in that it is used as an excuse when something doesn't make sense.