a genital version of a booger; ie, a piece of dried semen found in, on, or around the penis. also a common insult or putdown comparing one to the aforementioned definition
When you cum but instead of being a lot in one burst it comes out in smaller splurts but ends up with you actually cumming more due to the number of bursts, despite the small volume of each splurt. Tend to also feel more pleasurable then short bursts.
Joe: Ahhh! I'm cumming!!!
Yuri: Don't pull out Joe! Oh yeah!!
Joe: (while orgasming) oh yeah this feels so good
Yuri: Oh yeah joe uhhh I think it's cum nuggets your cumming so much and so many times ahhhh...
you get the idea