Cumteen Share definition Flag When your girl leaves you blue balled, so you get back at her by bustin a nut in her canteen Me and my girl were messin around last night and in the middle of it she wanted to stop..i said fuck that so i gave her the cumteen. Cumteen by yaboy8619 February 3, 2010 0 0 Get merch Get the Cumteen mug. Buy Now — $32.95 See more merch