Kłamstwa, kłamstefka i nieprawdki

weasel words 

something that someone says either to avoid answering a question clearly or to make someone believe something that is not true

talk the talk ... walk the walk

If you say that someone talks the talk but does not walk the walk, you mean that they do not act in a way that agrees with the things they say.

stretch the truth

to say something which is not completely honest in order to make someone or something seem better than it really is

take sb in 

to cause someone to believe something which is not true, or to trick or deceive someone

sleaze factor 

a part of a situation, especially a political one, which shows a low standard of morality

skulduggery 

secret and dishonest behavior

put sth about/around 

to tell a lot of people something that is not true

mythologize 

to create a false picture of a situation

mendacity noun 

the act of not telling the truth

make sth up 

to invent something, such as an excuse or a story, often in order to deceive

Look who's talking! 

You're a fine one to talk! , also You can/can't talk! , US also You should talk!

something you say when someone criticizes you for something that they do themselves

I'm lazy? You're a fine one to talk!

live a lie

to live in a way that is dishonest because you are pretending to be something that you are not, to yourself or to other people

lie through your teeth 

to tell someone something which you know is completely false

It takes a thief to catch a thief. 

used to mean that one dishonest person can guess what another dishonest person might do

flim flam noun 

talk that is confusing and intended to deceive

feed sb a line 

to tell someone something that is not completely true, often as an excuse

economical with the truth 

avoiding stating the true facts about a situation, or lying about it

bad faith 

dishonest or unacceptable behavior

charade 

 [C] an act or event which is clearly false

concoct

to invent an excuse, explanation or story in order to deceive someone

falsehood noun 

 [U] lying

fabricate verb 

to invent or produce something false in order to deceive

flannel verb 

to use a lot of words to avoid telling the truth or answering a question, often in order to deceive

hogwash noun 

nonsense, or words which are intended to deceive

sharp practice 

a way of behaving, in business, that is dishonest but not illegal

snow 

 [T] US informal to deceive or trick someone by clever talk or by giving them a lot of information

She's always snowing the bosses with statistics

nawet snow :|