misrepresent, belie - represent falsely; "This statement misrepresents my intentions"

make believe, pretend, make - represent fictitiously, as in a play, or pretend to be or act like; "She makes like an actress"

play possum - to pretend to be dead

take a dive - of a boxer: pretend to be knocked out

bullshit, fake, bull - talk through one's hat; "The politician was not well prepared for the debate and faked it"

mouth - articulate silently; form words with the lips only; "She mouthed a swear word"

disguise - make unrecognizable; "The herb disguises the garlic taste"; "We disguised our faces before robbing the bank"

behave, act, do - behave in a certain manner; show a certain behavior; conduct or comport oneself; "You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people"

sham, feign, simulate, assume - make a pretence of; "She assumed indifference, even though she was seething with anger"; "he feigned sleep"