American Heritage Dictionary
(23)
Century Dictionary
(16)
GNU Webster's 1913
(5)
WordNet
(8)
Elsewhere on the web
The reason for the bump is that last year, workers were in trouble.— news | SH | http://www.heraldtribune.com
The article also mentions the two will share a fist-bump, a celebratory exchange made popular during Obama's 2008 campaign.— IGN Comics
This bump is attributed to their new lithium ion battery, which can store more power than the nickel-metal hydride (NiMH) batteries found in traditional Prius models.— Gizmodo
I would conclude that this bump was the result of frightened and depressed right-wing viewers huddling in the warmth of the channel where they get the most comfort.— News Corpse
This bump was attributed to last year's movie American Gangster with Denzel Washington, for which Crowe returned a healthy $10.80 for every dollar he was paid.— Screen News

American Heritage Dictionary (1)
Century Dictionary (5)
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 about twice a week.
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