1. superlative form of crawly; causing a sensation of insects or discomfort crawling on the skin; creepy or unsettling
Usage: informal; chiefly British

Examples

• That horror movie was the crawliest thing I've ever watched.
• The old basement felt crawliest in the dark.
• She found the texture of the fabric crawliest and refused to wear it.
• The crawliest part of the hike was walking through the spider webs.
• His crawliest habit was staring without blinking.