From sop +‎ -er.

sopper (plural soppers)

1. Someone who sops.
   • 19th century, Thomas Hood, Ode to St. Swithin

     The very Dryads are not dry, but soppers, / And from the Houses' eaves / Tumble eaves-droppers.

• OPREPs, pre-ops, preops, repops

sopper

1. alternative form of soper

sopper m

1. indefinite plural of sopp