A madcap plan or scheme is very foolish and not likely to succeed.
例句
The politicians simply flitted from one madcap scheme to another...政客们只是蜻蜓点水般辗转于一个又一个荒唐的计划之间。His fast-paced novels are full of bizarre situations and madcap antics.他那些快节奏的小说里充满了怪诞的场景和荒唐的行为。
英英词典释义
Noun
1. a reckless impetuous irresponsible person
Adjective
1. characterized by undue haste and lack of thought or deliberation;
"a hotheaded decision""liable to such impulsive acts as hugging strangers""an impetuous display of spending and gambling""madcap escapades"; (`brainish' is archaic)