ingrate - a person who does not show proper appreciation or thanks for something : an ungrateful person

Moocher - to ask for and get things from other people without paying for them or doing anything for them

Taking point for using proper terms, without so much as an explanation, is a weak and punk-a$$ thing to do. Explain how those two words I used are misapplied.

Craven - having or showing a complete lack of courage : very cowardly