1. most lacking in good taste; most cheap-looking or gaudy (superlative form of tacky)
Usage: informal

Examples

• That was the tackiest outfit I’ve ever seen at a wedding.
• The hotel lobby had the tackiest decorations with fake gold everywhere.
• She always buys the tackiest souvenirs from every vacation.
• The tackiest part of the restaurant was the plastic flamingo centerpieces.
• His tackiest joke made everyone uncomfortable at dinner.
• The tackiest house on the block had bright pink shutters and lawn ornaments.