Definitions

1. noun

A person who is being deceitful or underhand, often by pretending to be something they are not, especially in order to gain an advantage.

“She was accused of being a mallemuck, trying to convince everyone that she was a victim when in reality she was the one who had started the argument.”

2. verb

To act deceitfully or underhandedly, especially by pretending to be something one is not.

“He was caught mallemucking his way into getting a promotion by manipulating his boss.”