IPA: /ˈtækiɪst/
KK: /ˈtækiɪst/
Describing something that is overly showy, cheap, or in poor taste, often in a way that is considered embarrassing or lacking in style.
The decorations at the party were the tackiest I had ever seen, with bright colors and clashing patterns.
Comparative: tackier
Superlative: tackiest
Tackiest → It is formed from "tacky" (originating from the American English term meaning sticky or adhesive) and the suffix "-est" (used to form the superlative degree). The word "tackiest" means the most sticky or adhesive, but it is often used metaphorically to describe something that is in poor taste or overly gaudy.
Think of something that is the 'most sticky' or 'adhesive' ('tacky') — that's why 'tackiest' describes something that is overly gaudy or in poor taste.