Exactly. Right before she says that she says, "Didn't mean to spill that liquor all on my attire. I've been drinking watermelon." She is just naming ha favorite drink.
It's a drink, just a drink. 5 months ago, when they were at the 40/40 club, E-online reported that Bey spilled that drink on her dress and Jay helped her clean it up. I can't find the article now. But it was the time when she had that long white dress.