Bedaub

Bedaub \bih-DOB\ , transitive verb;

1. To smudge over; to besmear or soil with anything thick and dirty

2. To overdecorate; to ornament showily or excessively

Bedaub dates to the mid-16th century and is a combination of the prefix be- and daub.

Daub, as a verb, dates to the late 14th century from Old French dauber ("to whitewash, plaster"). Dauber, as a surname, is recorded from the mid-13th century and is presumably from the same Old French word. Old French dauber may be derived from Latin dealbare, a compound of de- + albare ("thoroughly" + "to whiten"). Albare comes from albus ("white"), which derives from the Proto-Indo-European base *albho- ("white"). Albus and *albho- are also the forebears of alb. 

Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Tuesday, March 29
Etymologies come from the Oxford English Dictionary and/or Etymonline.com