wimp
(Informal)
[noun]
Synonyms: weakling, coward, drip (informal), mouse, sissy, softy or softie

[TahlilGaran] English Synonym Dictionary ▲

I. wimp¹ /wɪmp/ noun [countable] informal
[Date: 1900-2000; Origin: Perhaps from whimper]

1. someone who has a weak character and is afraid to do something difficult or unpleasant:
Don’t be such a wimp!

2. a man who is thin and physically weak
—wimpish, wimpy adjective

[TahlilGaran] Dictionary of Contemporary English ▲

II. wimp² verb
wimp out phrasal verb spoken
to not do something that you intended to do, because you do not feel brave enough, strong enough etc Synonym : cop out

[TahlilGaran] Dictionary of Contemporary English ▲

WIMP
Woman In Man's Pants (usually only men are called this)

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲