crow as in reefer ? since my last update i thought of J'BUG or J-BUG (jitterbug) but i think it'll get lost in the abbreviation plus googling reveals so many j-bug outfits like car parts supplier etc. s-i-g-h!
Agreed, and you are putting yourself under self imposed constraints by using all the space for just four letters. You could, if you really want it so large, go three & three, like this:Can you get away with it? No, the apostrophe will take up as much space as a regular letter. Plus, I don't like it. The abbreviation of "cot'n" is, as you asked, too much of a massacre of the English language.
I like the suggestion of @handymike of Juke, as in juke joint. Juke joints were so popular through the mid half of the 20th century that Little Walter Jacobs immortalized the word in his harmonica instrumental from 1952: