fauxcabulary 

n. Vocabulary people use to try to put on an image or sound smart. For example, people referring to Nitrous Oxide as 'NOS', which is just flat out wrong.

Can also refer to words which sound like they have meaning, but don't.

Kevin, enough will your bullshit fauxcabulary. I know you know nothing about topic of discussion.

fauxcabulary by 175623226 December 24, 2006

fauxcabulary 

Pretending to have a large vocabulary

Using an obscure portmanteau like "portmanteauspicious" to describe a situation whereby an opportunity to express unnecessarily large complex words is presented.
"He was using big words like she had a big vocabulary, but all he really had was a fauxcabulary"

fauxcabulary by seannorling August 31, 2015

Facecabulary 

A person's facecabulary is the set of faces within the human race that are familiar to a person. When a certain face is made, it's immediately recognized with certain connotations.

Frieda instantly saw Caitlin's scowl and identified it as negative facecabulary.

That chart at the doctor's office that shows varying degrees of pain has excellent facecabulary.

Facecabulary by dancemomsisonrightnow July 20, 2012