milquetoast

Short definition from Wiktionary

Adjective

1. 1
   Meek, timid; lacking character or effectiveness.
2. 2
   Alternative letter-case form of milquetoast.

Noun

1. 1
   A person of meek or timid disposition; a person who lacks character or effectiveness.
2. 2
   Alternative letter-case form of milquetoast.