VOA慢速英语:Can You Catch a Liar?

fidget – v. to make a lot of small movements because you are nervous, bored, etc. : to move or act in a nervous or restless way

shift – v. to move or to cause (something or someone) to move to a different place, position, etc. shifty - adj. having an appearance or way of behaving that seems dishonest

smoke out – v. to drive out by or as if by smoke :  to cause to be made public

pretend – v. to act as if something is true when it is not true : to imagine and act out

make-believe – n. things that are imagined or pretended to be true or real

evasive – adj. not honest or direct

erratic – adj. acting, moving, or changing in ways that are not expected or usual : not consistent or regular

interrogate – v. to ask (someone) questions in a thorough and often forceful way

web – n. a net made from silk threads woven together by a spider — often used figuratively — often + of

He was caught in a web of lies.
a tangled web of deceit/deception
contradiction – n. the act of saying something that is opposite or very different in meaning to something else

do not add up – informal expression If a situation does not add up, there is no reasonable or ​likely explanation for it

dig a hole for yourself – informal expression to get yourself into a ​difficult situation