Seriously. As a child I enjoyed little more than reading dictionaries and encyclopedias, and when I discovered the OED (and in my tender young manhood, Kittel’s Theological Dictionary of the New Testament and its exhaustive treatment of Koine Greek *sigh*), well, I was in hog heaven.
So, understand that when I read some illiterate blurb in an email come-on to an online article such as the sentence below, I am a bit disturbed:
“It’s not the cheapest set out there, but it’s chalk full of features.”
It’s not that the author of the blurb is necessarily functionally illiterate (he did, after all, manage to spell his misused word correctly *heh*), but that he apparently has no idea that “chalk full” is nonsense reveals that he’s actually read very little. Any even passably semi-literate person such as myself knows full well that the phrase is “chock-full” or a close variant, and dictionary addicts such as I know why (hint *cough*: the majority opinion leans toward the first word in the term deriving from the Middle English “chokken“–meaning to cram or pack tightly, and NO opinion of any literate person even considers “chalk” to be in the same room as “chock” for the expression :-)).
Then blurb was written, more than likely, by some subliterate college graduate who’s heard the expression but never read it… and never even considered that looking up an expression he’s heard but not read might be a Good Thing before putting it in print.
Dumbass.
And, as my Wonder Woman pointed out to me, the writer of that excrescence is apparently an illiterate, uncultured savage whose only exposure to coffee has been limited to the crap sold by Starbucks and other boutique gathering places of the illiterati. Otherwise, he might have heard of, seen or even imbibed some of this:

(OK, OK, my Wonder Woman was too kind to characterize this savage as what he–oh! dread! it could be a “she”! *heh*–obviously is. I added the “illiterate, uncultured savage” and the comment on the crap that’s sold as coffee by Starbucks. Doesn’t make my editorializing incorrect, though.)