noun雞腿打人牙關軟
nounto bribe someone with a small gift:
nounto offer a chicken leg (a small gift), and in return, the other person's joints of jaw becomes loose which is a metaphor for either to put in some good words for you or to tell you information you wanted.
noun(hit someone's jaw with a drumstick and the jaw will be soften); to persuade someone by offering him/her something pleasant