"fit of weeping," 1894, imitative, or from blubber (v.). As a verb by 1843. Related: Blubbed; blubbing.
Entries linking to blub
blubber v.
"to cry, to overflow with weeping" (usually disparaging), c. 1400, from blubber (n.). In Middle English also "to seethe, bubble" (late 14c.). Related: Blubbered; blubbering.