Bleb

Bleb may refer to:
 * Bleb (cell biology), an irregular bulge in the plasma membrane of a cell
 * Bleb (medicine), a large blister filled with serous fluid, or jargon for an outpouching of any kind, from a vessel (see Aneurysm), or an air pocket in the lungs (see Focal lung pneumatosis)
 * Bleb (mineralogy), a small bubble-like inclusion of one mineral within a larger mineral
 * Bleb, a book of poetry written by B-52's frontman Fred Schneider