Someone who programs in the computer language LISP.(noun)
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Use "lisper" in a sentence
"The latest brain-dead decision (to let their lisper in residence, Jonathan Ross, walk from the corporation) is one which confounds me."
"Churchill was -- didn't go to university, couldn't get in; he was a lisp -- lisper, stutterer."
"BRIAN LAMB, host: James C. Humes, author of "Confessions of a White House Ghostwriter," I understand from your book that you started off in life as a lisper and a stutterer?"