adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Describes crying in a weak, pitiful, or self-pitying manner, often with a negative connotation. Commonly used with する or と.
叱られた子供がメソメソと泣いている。
The scolded child is sobbing.
いつまでもメソメソするな。
Don't keep whimpering forever.