According to lie detection experts these 8 words/ phrases are used most by liars

"Left" 
Sure, sometimes 'left' is the only word you can use in a situation, but there's some kind of drama involved when he/she uses it in place of another word that will do (think: "I left the bar at six" vs. "I went home at six"). It could be due to his/her desire to "leave" the lie behind. 

"Never" 
The big thing to look out for is when he/she says "never" when "no" will do. It's a sign she/he's overcompensating. 

"That" 
Like never, it depends on how a person uses it. If he/she puts "that" in front of a noun, like "that woman" or "that money," it's a subconscious attempt for him/her to distance themself from the word. This is a common trick of manipulators. 


"Would" 
If he/she skips "no" and goes straight to "I would never do something like that!" when talking about a past event, be wary. For example, "Are you still talking to your ex?" "I would never do that to you!" "Would never" suggests that he plans to do it in the future. 

"Yes, ma'am" 
If a guy is a Southern gentleman, then this doesn't apply. But if he suddenly says "ma'am" to you out of nowhere, be cautious. It's a sign that he feels like he's feeling stressed and knows he's in trouble. 

"By the way…" 
Liars use phrases like this to try to minimize what they say next-but usually it's what's most important to the story. Pay extra attention to what he says afterward. 


"But" 
Liars usually try to downplay what they say with this word, so pay attention when he/she says something like, "I know this is going to sound strange, but…" or "I know you think I'm lying, but…" 

"Why would I do that?" 
It's a favorite stalling line of liars, so they can buy a little time to work out what to say next. These phrases also fit the bill: "What kind of person do you think I am?", "Are you calling me a liar?", and "I knew this was going to happen to me!"