c.1300, from M.Dan. drippe, from P.Gmc. *drup-, from PIE base *dhreub-. O.E. had related drypan "to let drop," dropian "fall in drops," and dreopan "to drop." Related: Dripped; dripping. The slang meaning "stupid, feeble, or dull person" is first recorded 1932.
A tedious, unimaginative, conventional person; square, wimp •The term was apparently used a decade earlier in British schoolboy slang: the biggest drip at Miss Basehoar's, a school ostensibly abounding with fair-sized drips/ such drips; they're just sort of dull(1930s+ Teenagers)
Useless and idle talk; gossip (1930+ Hoboes)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source