Crumbly

The waistband has lost its elasticity and now it's all crumbly and itchy.

This focaccia is tasty and crumbly.

Cornish cows create crumbly cowpats.

This dish is very crumbly.

Feta cheese is crumbly.

Feta cheese and cojita are both crumbly.

Near-synonym: crumby

If they are right, then why aren't we seeing old crumblies like you on the cover of Vogue?