1. superlative form of gauche; most lacking in social grace or tact; most awkward or tactless in manner or behavior
Usage: superlative degree; formal or literary usage
2. superlative form of gauche; most left or on the left side
Usage: heraldry or formal contexts; rare

Examples

• His gauchest remark at the dinner party made everyone uncomfortable.
• That was the gauchest thing you could have said to the ambassador.
• Her gauchest behavior during the formal event shocked the other guests.
• He made the gauchest joke at the wedding reception.
• The gauchest display of wealth turned off potential friends.
• That gauchest comment revealed his complete lack of social awareness.