A person who tries to bluff other people. Synonym:four-flusher.
Bluff
adjective
1.
Very steep; having a prominent and almost vertical front. Synonyms:bold, sheer."Where the bold chalk cliffs of England rise" , "A sheer descent of rock"
2.
Bluntly direct and outspoken but good-natured. "A bluff and rugged natural leader"
... does, he's a bluffer," Deacon cut back. "I'm getting tired of all this poppycock. Mr. Gee, you will favour me and put yourself in a better light if you tell how you know who that man was that just dropped anchor. After that ... — A Son Of The Sun • Jack London