Lerp sounded so strangely familiar, I had to look it up:

(The pear psylla insect is such a pest.)

From Wikipedia:
"Lerp may refer to
Lerp (biology), a structure produced by larvae of psyllid insects as a protective cover.
Lerp (computing), a quasi-acronym for linear interpolation in computing and mathematics."

http://msdn.microsoft.com/en-us/library/windows/desktop/bb509618(v=vs.85).aspx