pickthank

To obtain by the methods of a pickthank.

One who picks a thank (see under pick, v.); an officious fellow who does what he is not asked to do, for the sake of gaining favor; a parasite; a flatterer; a toady; also, a talebearer; a busybody. Also used adjectively.

One who strives to put another under obligation; an officious person; hence, a flatterer. Used also adjectively.

A sycophant, a yes-man.