urban dictionary definition:

Celebrated on March 14th, Steak and Blowjob Day is a holiday for men, celebrated the month after Valentine’s Day — a holiday for women.  

The idea is simple: no cards, flowers, candy or other whimsical gifts. Ladies (and gay men), you simply bestow your partner with a steak and a blowjob. Not necessarily in that order. For example . . .

Dave: “Hey Bob, what did Sally get you for Steak and Blowjob Day?”  

Bob: “Well Dave, that would be a big juicy steak, and a big juicy blowjob.”

not sure i can see this one catching on really.