From Purple Parrot, 1947.  See Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

"Psst!  Go pffft with your Bmmfft!"  From 73 Magazine, 1967.  See Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

We're not sure what "szqrlbh" means, but "sqlcnrbc" meant "ordinary" in an Army code memory experiment (Secret, Don't Tell, The Encyclopedia of Hypnotism by Carla Emery and illustrated by Corey Smigliani).  See Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

Professor Hmnnn lectured at the University of Toronto and was "distinguished by a pleasantly vague and disconcerted look in the winters and a pleasantly disconcerted and vague look in the summers" (John Robson).  From The Martlet, Jan. 20, 1969.  See Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

A headline of all-consonant words!  We had to consult Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.  (Just because we wrote it doesn't mean we memorized it!)  From Innis Herald, 1984.

Here's a mention of a nonsensical vowelless word ... and we wish the consonants in question had been included, because it might very well have appeared in Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

From Million Dollar Baby by Amy Patricia Meade, 2006

We're honored to have served as editor of the new Webster's Dictionary of Improbable Words, collecting hundreds and hundreds of all-vowel and all-consonant words from literature.  It's a word gamer's secret weapon.  Pioneering lexicographer Noah Webster (October 16, 1758 – May 28, 1843) published his first Compendious Dictionary of the English Language in 1806.  He spent decade after decade expanding his dictionary to make it more comprehensive.  Webster's Dictionary of Improbable Words is a testament to the great wordsmith’s dedication.

When the enemy is upon you, just "m-m-b-l-m-b-l-m."  From The Judge, 1917.    See Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.

Did you know that the quick brown fox actually jumped over "the lazy mrpldrk"?  It's true; it's in Bewitched, and it made it into Webster's Dictionary of Improbable Words: All-Consonant and All-Vowel Words.