Compare bleb and blob.
blub (third-person singular simple present blubs, present participle blubbing, simple past and past participle blubbed)
- To cry, whine or blubber
1922, James Joyce, Ulysses (novel), Vintage International (1990), page 80:
- Like to see them sitting round in a ring with blub lips, entranced, listening.
- (obsolete) To swell; to puff out, as with weeping.