What is the meaning of the underlined words in this excerpt from act i, scene i, of richard iii?

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what is the meaning of the underlined words in this excerpt from act i, scene i, of richard iii?
richard iii (duke of gloucester):
but i, that am not shaped for sportive tricks,
nor made to court an amorous looking-glass;
i, that am rudely stamp'd, and want love's majesty
to strut before a wanton ambling nymph;
i, that am curtail'd of this fair proportion,
cheated of feature by dissembling nature,

deformed, unfinish'd, sent before my time
into this breathing world, scarce half made up,

the meaning of the word ambling is .
the meaning of the word curtail'd is .