Boyish :: Boyish (a.) Resembling a boy in a manners or opinions; belonging to a boy; childish; trifling; puerile.
Boyishly :: Boyishly (adv.) In a boyish manner; like a boy.
Boyism :: Boyism (n.) The nature of a boy; childishness.
Whiteboyism :: Whiteboyism (n.) The conduct or principle of the Whiteboys.