(1):

(n.) One who swings or whirls.

(2):

(n.) One who swinges.

(3):

(n.) Anything very large, forcible, or astonishing.

(4):

(n.) A person who engages frequently in lively and fashionable pursuits, such as attending night clubs or discos.

(5):

(n.) A person who engages freely in sexual intercourse.