A celebratory phrase used following one, or a series of, positive, though generally insignificant event(s).
Its origin can be attributed to Milhouse
, a character of television show The Simpsons
, who coined the phrase in jubilation after realising the success of his flood pants to keep his cuffs bone dry.
"I left work 10 minutes early today, and I found $2 in the passenger seat of my car! Everything's coming up Milhouse!"