From Harry’s song. It almost certainly means consuming and enjoying a extremely stereotypical black guys cum.
Man 1: yo, have you heard what watermelon sugar means? Man 2: naw, it’s too obscure Man 1: I have seen many say it’s referring to ejaculate. Man 2: yeah, seen that too. Man 1: well according to this person it’s from a black guy Man 2: hold the fuck up! If that’s true I’ll give Harry my watermelon sugar
By HololiveSIMP
The act of eating a girl out. (Eating licking or sucking on pussy)
Yeah bro last night I got some watermelon sugar!
By Watermelon sugar
Harry styles drinking niall the whore's jizz
Damn harry, swallow my watermelon sugar!
By smartest person so fuck off
cocaine
"hey you got the watermelon sugar" he said , she replied "you got the money"
By jetty da idiot
Watermelon Sugar is a phrase coined by the author, Richard Brautigan, and was the nebulous topic of his underground famous novella (1964), "In Watermelon Sugar".
My life was made out of watermelon sugar.
By Liberty Bird