to have sex in a limousine in doggy style while using your partner as a platter for a plate of the best steak ever. Preferably performed in a hot tub full of chocolate while a guitarist plays an amazing solo during every climax. Location is optional.
Last night, i had steaktacular and it rocked. Now im not hungry or a virgin!
See also; pwned.
A medal given in Halo 3 when (in a Team Slayer match) you defeat the other team by at least 20 points. The medal isn't visible in the game, you'd need to go to Bungie's website to view it there.
Luke owes me a steak dinner for that steaktacular.