穿帮

chuan1 bang1

(TV or movie) blooper; continuity error; (theater) to flub one's lines; unintended exposure of a body part; to be exposed (of a scheme or trick); to reveal sth one intended to conceal through a slip of the tongue; to blow one's cover

帮忙

bang1 mang2

to help; to lend a hand; to do a favor; to do a good turn

帮助

bang1 zhu4

assistance; aid; to help; to assist

黑帮

hei1 bang1

bunch of gangsters; criminal gang; organized crime syndicate

帮办

bang1 ban4

assist in managing; deputy