Crazy; not sane.
To make the call of a cuckoo.
To repeat something incessantly.
The cuckoo clock itself.
The sound of that particular bird.
A person who inveigles themselves into a place where they should not be (used especially in the phrase a cuckoo in the nest).
Someone who is crazy.
Any of various birds, of the family Cuculidae, famous for laying its eggs in the nests of other species; but especially a common cuckoo (Cuculus canorus), that has a characteristic two-note call.
The bird-shaped figure found in cuckoo clocks.
Insane; crazy, mentally deranged.
Bizarre; incredible.
Extremely foolish or unwise; irrational; imprudent.
Having impaired polarity.
Wildly confused or excited.
Intensifier, signifying abundance or high quality of a thing; very, much or many.
Abnormally ferocious or furious; or, rabid, affected with rabies.
Used litotically to indicate satisfaction or approval.
Angry, annoyed.
Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for.
Intensifier; to a large degree; extremely; exceedingly; very; unbelievably.
To madden, to anger, to frustrate.