pretend

don't fucking pretend; who the fuck are you trying to kid? [colloquial]

disguise

dress up

dress up as

to be arrogant / cocky [colloquial]

to pretend one is a representative, it means one does not know much but acts as if one knows a lot

to disguise as; to impersonate

to pretend dumb or stupid

to pretend; to dress up as; to disguise as

(verb) to pretend; to fake; (adjective) pretentious

to act the big shot [colloquial]

pretend to be a good / kind person

to be boastful; to claim to be very powerful [colloquial]

verb; literally: one acting as a crab; run amuck like a crab; describe one to act capable when acutally not

to act as if one is very powerful; to behave pretentiously [colloquial]

to be boastful; to claim to be very powerful [colloquial]

to act as if one doesn't know something [colloquial]

to play dead [colloquial]

play the role of

costume appearance

to act as if one is so smart and knows it all [colloquial]

to pretend to be ignorant

to act as if one is stupid; to play ignorance [colloquial]

to act as if one is wealthy [colloquial]

people who put on a mask and pretend, but their real self will show during important moments; a wolf in sheep's clothing

(phrase) literally means 'Act like a pig, bite the tiger to death'; pretend to be dumb and harmless while waiting for one's chance to attack an enemy.

feigning

(verb) to beautify; to apply makeup; to dress up; to adorn; to deck out

verb; dress up