When a person is mentally incapable of functioning whilst having any sort of mobile device in front of them. Typically characterized by open, slack jaw, glassy eyes and a zombie-like sway or teeter.
"Ashley! Ashley! I've been talking to you for well over minute and you've gone all phone dumb".
by Baxter Wilde August 22, 2014
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The opposite of a smart phone such as the iPhone, Droid, and BlackBerry.
Dumb phones are LG Vu, Sidekick, Razor, Boost Mobile phones, Nextel and good ole boy Motorola's
by centerco13 March 9, 2010
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A cellular telephone that has the capabilities of...well a telephone
Tech saavy douche: Thank God I don' have a dumb phone so I can go on Facebook and play Angry Birds on this road trip, otherwise I might have had to interact with other people.

Real person: **sigh**
by lolocaust21 May 15, 2011
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"Dumb phone" is a coarse reference to the largely obsolete portable cellular telephones (of differing brands) made from 1983 to 1999. Majority of them were manufactured by Motorola from 1983 to 1999. Other manufacturers during that period include Ericsson, Sony, Nokia, Mobira and Oki.

Contrary to popular belief, dumb phones do not refer to feature phones (mobile phones made from 2000 - present with little features as compared to smart phones).
Al: Did you see that New Zealand ad? The one about the gal who used a dumb phone 'coz her insurance plan was so damn expensive?
by Heych September 16, 2010
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What you call your phone when it's being a retard
"Aw stupid mc dumb-phone"
by Mali656 December 1, 2017
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ADJ. the state of being confused, or dumfounded, as to how to properly use a smartphone (such as an iPhone, Droid, or Blackberry),or some of its features, as a result of only previously owning "dumbphones".
I was quite comfortable with my Moto RZR but once I got my Droid Incredible, I was simply dumb-phone-ded.
by Saul Danton December 25, 2010
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