American Heritage Dictionary
(1)
Century Dictionary
(2)
GNU Webster's 1913
(2)
WordNet
(2)
Elsewhere on the web
Big Lebowski bizzaro or even Raising Arizona madcap might be disappointed, but the film is funny.— AltWeeklies.com Site Feed
Prepare yourselves for a madcap entree of murder and menace with a heaping side of pasta and laughter.— Kingsport Times News - Daily 5
Fans of the TV episodes will feel reassured at this kind of madcap thinking, others may struggle with the concept of pumping honey through a collection of pipes to a beer-tap style dispenser in the corner of a room, but it's whimsical and totally befitting of the series in general.
And much of it is committed to the kind of madcap schemes that would get nowhere with most of Britain's planners.— Home | Mail Online
The travel accounts are a bit madcap - impressionist glimpses of Brunei, Tibet, China,— The Nation - Breaking News

Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word several times a year.