Searching for a term, can you assist me?

This might be a true challenge.

I am unfamaliar with the concept and want to learn more on the topic so as it stands I don’t have a full or accurate definition of the term.

It is a psychological term.
It refers to someone who responds disproportionately to positive stimulus i.e. compliment, smile etc.

No it is not narcissist, synchophant, or someone who is obsequious—But it may refer to a politician. :P