Hypocritical liar 

Someone who lies about other people lying.

Person 1: "Person 2 is lying"
Person 2: (actually telling the truth)

Person 1 is a hypocritical liar.

Hypocritical liar by dishonest March 15, 2014

Compulsive Liar 

Someone who lies constantly no matter how fruitless or insignificant the lie may be. They lie about everything. Sometimes even to try and have a "cool" persona and they may or may not believe their own lies are true, like a pathological liar.

Tanner: I live in a ten story house and have 4 maids
James: ....yeah okay.
Tanner: I knocked a girl up once and I've got a baby.
James: ...I'm sure.
Tanner: I just got into a knife fight with a man that broke into my house and I wooped his ass ..but I need stiches!
James: Yeah right. Shouldn't you be in the hospital then? let me see your wound..
Tanner: Ah, man, you don't wanna see it. its pretty gross.
James: You're a compulsive Liar

Compulsive Liar by pseudonymismynamee May 30, 2009

study liar 

A person who claims to study for exams much less than they actually do.

She said she only studied 30 minutes for that midterm. She's such a study liar!

study liar by Bungalow Bill February 22, 2002

brb-liar 

Someone who says "be right back" in an instant messaging session and never returns, or returns hours/days later.

"You brb-liar! You've been gone for a week!"
"He's such a BRB liar. You won't hear from him again until Thursday"

brb-liar by CoachW February 6, 2008

compulsive liar 

Someone who lies so much that they believe themselves.

"Mr. Garratt is a compulsive liar. He'll tell you one thing one day and contradict himself a week later.

compulsive liar by jitterballs February 13, 2006

You're a liar and a troll 

A famous line originating from Nsider2 forums said many times by its biggest troll. He pretends that he is not a troll and puts the blame on others

"I thought I was the number one VJ fan"

"You're a liar and a troll"

You're a liar and a troll by megamario621 April 14, 2009

Penis Liar 

Someone who lies and/or denies having a penis. Mostly in girls or gay guys.

JT: Dude Katrina is such a penis liar!
Josh: Uggghhhh i hate penis liars, she can go hang out with lady gaga!

Penis Liar by Foshizznittzile March 25, 2010