Bullshitter
Definition 1 of 2

Context
The term is most applicable in casual conversations where expressions of doubt or frustration are prevalent.

I can't believe he tried to sell me that idea—what a bullshitter!
Nuance
Although it often conveys a strong negative connotation, the word can be used in a lighter, humorous context among friends.

She joked about being a bullshitter when it came to crafting stories.
Caution
Due to its vulgar nature, be careful where you use this word; it might be inappropriate in professional settings.

I wouldn’t use 'bullshitter' in a job interview.
Compare with
liarfraudbluffpretendskeptic
WordUp Chrome Extension
As you browse the web instantly look up words you don’t know.
Get Chrome Extension