So it means you are sexy and delicious and someone wants to eat your body. Some people think it is offensive or nasty. But it isn't. It means you have a nice body and as guys say it "The junk fits perfectly in the trunk" which means you have a nice rear end. And two nice, firm melons (also known as breasts)
For a guy, smexxalicious would mean having nice muscles or having a nice buttox. Girls usually refer guys to a "stud"
Justin: Hey, you are so smexxalicious
Madison: Thanks, you are too
Justin: Wanna go to the mall Madison: Sure as long as I get called smexxalicious again
Justin: You are smexxalicious
Madison: I know :)
Justin has gotten himself a date with his now "girlfriend" Madison