"clumsy speech" is a correct and usable phrase in written English.
It refers to speech that is awkward, uncoordinated, or lacking in grace or fluency. It can be used to describe someone's speaking style or to highlight a specific instance of awkward speech. Example: During the presentation, the nervous student's clumsy speech caused her to stumble over her words and lose the audience's attention.
Morsi, in a clumsy and dishonest speech to the nation, blamed it all on "thugs" and a "fifth column" organized by the remnants of Hosni Mubarak's regime.
He has described his work as "super-real", and certainly his dialogue, with every "um" and "ah" carefully included, is as clumsy as real speech.
At the September 2008 conference Miliband damaged himself with an indifferent speech, clumsy pictures of him holding a banana and then being overheard in a lift saying he had to avoid a Heseltine moment, an overt reference to his leadership ambitions.
Whorf used clumsy translations of Hopi speech that concealed the extent to which they talk about time (references to yesterday, tomorrow, days of the week, lunar phases, etc).
The first is musical -- a clumsy nod to a speech so slippery, its own people increasingly don't know it.
If you're trying to talk to this shy gentleman, he will probably become clumsy and have blurred/stalled speech.
His speeches are clumsy and repetitive, and on his ability to lead MPs he scores zero.
The Republicans took a clumsy phrase from an Obama speech in July, in which the president pointed out that most American business successes have been assisted by infrastructure, education or incentives underwritten by the government.
Yet got up for a big fight, they look like faulty robots: faces caged in behind their bright helmets, hands made clumsy by their swollen gloves, speech slurred by gumshields.
Some beginning signs of physical impairment are slurred speech, slow or clumsy movements, swaying, dropping objects (e.g., goods, money, keys) or forgetting thoughts in mid-sentence.
