What is cantilever?

When a male with in depth knowledge of engineering and architecture gets an erection.

Joe really took it to Jane with his cantilever beaver beater.

cantilever - meme gif

Grand Design's, Kevin McCloud's, favorite word describing an architectural object only supported on one end.

My dick cantilevered towards her pussy.

An architectural/structural term meaning "overhang," or a really nerdy way to talk about someone with large breasts.

Man, I sure like to stand under her cantilever.