To whimper is to make a low, soft feeble cry or sound usually because you are sad, in pain or otherwise unhappy.(verb)
When you feel very sick and let out a very small cry of pain, this is an example of a time when you whimper.
The definition of a whimper is a soft, feeble cry, or an anticlimactic or mild ending.(noun)
See whimper in Webster's New World College Dictionary
Origin: ? akin to whine
See whimper in American Heritage Dictionary 4
verb whim·pered, whim·per·ing, whim·pers verb, intransitive
Origin: Probably imitative.
Learn more about whimper