wimp
//wɪmp//
Noun
wimpSingular
wimpsPlural
1
A weak, cowardly, or ineffectual person.
Don't be such a wimp—just ask her out!
Verb
1
To act in a weak or cowardly manner; to back out of something due to fear or lack of courage (usually used with 'out').
He wimped out of the bungee jump at the last minute.