How would you play KK in this situation?

[Shaqalicious]

Question:

I was heads up at the final table at a 3K guaranteed tournament on Bodog. I was SB with a 3:1 chip advantage. Villian was basically shoving every time he hit a piece of the flop in hopes that I hit nothing and had taken about 20,000 of my 180,000 chips with this strategy. I was raising junk at times and overbetting monster hands, so I had a pretty reckless image to him. I limped in with KK and he checked his option. Flop comes 234r and he instashoves and flips over 84o and doesn't improve and I win the tournament. Was limping with KK a -EV play in this point in the game?