A flossberry is a tangled ball of blue floss with a leaf on it. In the episode Banned From The Stand, Mung Daal comes to Gazpacho's Food Stand looking for some new fruit. This is the berry Gazpacho shows him. According to Gazpacho, they will turn the teeth emerald green when one flosses with them if they are ripe, but if the teeth become grassy green they are premature.