not fully literate or not interested in literature
2.
of language that is incorrect or contains slang
subliterate in American English
(sʌbˈlɪtərɪt)
adjective
less than fully literate
Word origin
[1945–50; sub- + literate]This word is first recorded in the period 1945–50. Other words that entered Englishat around the same time include: individual medley, on-line, shootout, spin-off, synchronized swimmingsub- is a prefix occurring originally in loanwords from Latin (subject; subtract; subvert; subsidy). On this model, sub- is freely attached to elements of any origin and used with the meaning “under,” “below,”“beneath” (subalpine; substratum), “slightly,” “imperfectly,” “nearly” (subcolumnar; subtropical), “secondary,” “subordinate” (subcommittee; subplot)