To smash and bang a girl at the same time. When it is insufficient to smash a girl and/or bang a girl there is only one option and that is to Smang her.

The act of smashing and banging something simultaneously, generally, used as a colloquialism to refer to sex.

Basically, it's cum in a state of drippy-ness.

To commit the sex on someone on the floor with aggression.

a combination of the words smash and bang.
commonly used to describe the action of tools.

adjective - disgusting, unattractive, unusable, discarded, undesirable, destitute
noun - a substance of above description