noun
1.
Synonyms: caprice , bee, boutade, conceit, crotchet, fancy, humor, megrim, vagary, whim
2.
one that is physically abnormal
pitiful freaks displayed in sideshows
Synonyms: abortion, lusus, miscreation, monster, monstrosity
Related Word: aberration, chimera, malconformation, malformation, misshape, mosaic, mutation, sport; abnormality, anomaly, curiosity, oddity; rara avis, rarity; androgyne, hermaphrodite
Idioms: freak of nature
3.
Synonyms: enthusiast , bigot, bug, fanatic, fiend, maniac, nut, zealot