1. superlative form of cloggy; most likely to clog or become blocked; most obstructed or congested
Usage: informal; chiefly British
2. superlative form of cloggy; heaviest or most dense in texture; most likely to stick or adhere
Usage: informal; chiefly British

Examples

• The cloggiest part of the drain was right beneath the sink.
• This soil is the cloggiest I've ever worked with in the garden.
• The cloggiest sections of the highway were near the construction zone.
• Of all the recipes, this one produces the cloggiest batter.
• The cloggiest filter needs to be replaced immediately.