American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
(3)
WordNet
(2)
Elsewhere on the web
Can anyone explain to me why you used the word cheep?— Original Signal - Transmitting Buzz
TV: - Talk is cheep, and with that in mind, Twitter addiction is the latest online ill.— p2pnet news
You can get a new generation 120GB Archos player for $399 and although that isn't exactly cheep, it does store many more movies. ...— Megite Technology News: What's Happening Right Now

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 a few times a year.