Do you wonder about the meaning and definition of manipulation, because you feel as though someone is using psychological manipulation techniques on you? 10 signs of manipulation include when someone constantly makes you prove yourself or they communicate passive-aggressively. Manipulators often use gaslighting techniques, and are "always joking". Also, manipulators play the victim card, or kill you with sporadic kindness, followed by moments when they make you feel small. Manipulators emphasize their calm, cool, and collected side, use emotional blackmail, and take advantage of your trusting and sensitive nature.