Wiktionary
double dildo
n. A dildo in which both ends are designed for penetration.
Usage examples of "double dildo".
In addition to her spiked nipple cones, Anthea wore the infamous double dildo: the rigid length of stitched leather bobbed at her groin with menace, half of it buried in the bitch's own vagina, the median flange, knurled on both faces with studs, cupping her clit.
Julia started rocking as well, making the double dildo move even more.
Then I was handed a huge double dildo a rubber penis with identical heads on each end and I was to abuse this beautiful creature with it.