1. superlative form of gripy; most inclined to grip or hold firmly
Usage: informal; comparative form is 'gripier'
2. superlative form of gripy; most likely to cause gripping pain or cramps in the stomach or intestines
Usage: informal; medical/colloquial

Examples

• The gripiest tires on the market provide the best traction in wet conditions.
• This coffee is the gripiest blend we've ever tried—it really holds your attention.
• The gripiest part of the hike was the steep descent with loose gravel.
• That spicy food was the gripiest thing I've eaten all week.
• The gripiest gloves are essential for rock climbing.
• The gripiest shoe soles won't slip on icy surfaces.