リコシュギシャ
Composed of
self-interest
advocate (of a theory or principle); ideologist; -ist (i.e. adherent to a belief system); (arch.) socialist; (arch.) communist
Composed of
egoism; egotism; selfishness
person; -er; (arch.) expert; (arch.) geisha; (arch.) prostitute
Examples (2 in total)
Tom is an egoist.
He is nothing more than an egoist.