Mop-and-flop

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    an application procedure in which roofing elements (insulation boards, felt plies, cap sheets, etc.) are initially placed upside down adjacent to their ultimate location; coated with adhesive or bitumen; and turned over and adhered to the substrate. uncountable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.