When performing sex with a woman from behind, the man removes his penis from the woman and ejaculates in her hair. He then proceeds to rub his load into the woman's hair thus getting it all stuck and semi-representing rice getting stuck in the brides hair after a wedding.
I gave her a great white wedding. It was everywhere.
A wedding in which the bride can wear white for the traditional reason, that she is a virgin. Extremely rare these days, so much that it is often used ironically, such as in the Billy Idol song.
Drew: "I can't believe my little sister is getting married."
Billy: "Yeah, it's a nice day for a white wedding. HAHAHAHA!!!"
Drew: "Shut up dude, she's a virgin."
Billy: "Riiight...I seem to remember one night after she finished at the strip club, it was me, Joey, Kevin, Dan, Dr. Dre, the Dave Matthews Band, the Denver Broncos, the Penn State chapters of SAE, Sigma Chi, and KA, the guys from 'Jackass'...yeah, we all hit that."
Drew: "You idiot. Indabutt doesn't count."
Billy: "Sorry, man, you're right. She's as pure as the driven snow. I guess that's why she's 6 months pregnant and your dad's standing behind the groom with a shotgun while he sweats like a pig in a sauna."
Drew: "What the fuck?!? That dirty little slut!"
When someone who has been off cocaine relapses and begins to do it again, it is called a "white wedding".
"I've been away for so long
I let you go for so long
It's a nice day to start again
It's a nice day for a white wedding"
-Billy Idol's "White Wedding", referring to relapsing on cocaine
This is an addendum to your existing definitions. W.W. is junky parlance for the moment they untie the torniquet, their blood backs into the syringe glass and blends with the heroin mixture prior to the moment of injection.
Self explanatory. It's what Billy Idol really means. Great song by the way. "It's a nice day for a white wedding."