grotesque

adj. strange, weird, bizarre; distorted, deformed; ugly

n. odd or ugly person or thing; work of art in the grotesque style

When used in conversation, grotesque commonly means strange, fantastic, ugly or bizarre, and thus is often used to describe weird shapes and distorted forms such as Halloween masks or gargoyles on churches. More specifically, the grotesque forms on Gothic buildings, when not used as drainspouts, should not be called gargoyles, but rather referred to simply as grotesques, or chimeras.
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Noun
1. art characterized by an incongruous mixture of parts of humans and animals interwoven with plants
(hypernym) art, fine art
Adjective
1. distorted and unnatural in shape or size; abnormal and hideous; "tales of grotesque serpents eight fathoms long that churned the seas"; "twisted into monstrous shapes"
(synonym) monstrous, unnatural
(similar) ugly
2. ludicrously odd; "Hamlet's assumed antic disposition"; "fantastic Halloween costumes"; "a grotesque reflection in the mirror"
(synonym) antic, fantastic, fantastical
(similar) strange, unusual

adj. ludicrous, grotesque, ridiculous; farcical, preposterous

n. grotesque, ludicrousness

(n.)
Artificial grotto-work.
  

(n.)
A whimsical figure, or scene, such as is found in old crypts and grottoes.