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