Partly or not quite vertical.

In a subvertical manner

The use of parodies of corporate and political advertisements in order to make an ironic statement.

Someone who subverts

(anatomy) Situated beneath, or on the ventral side of, the vertebral column. / (anatomy) Situated beneath, or inside of, the endoskeleton; hypaxial; hyposkeletal.

plural of subvertisement

So as to subvert; in a subversive manner.

An individual piece of subvertising.

plural of subvertor

(archaic) second-person singular simple present form of subvert