wimpy
Concise Oxford English Dictionary © 2008 Oxford University Press:
wimp /wɪmp/ informal
▶noun a weak and cowardly person. ▶verb (wimp out) withdraw from something in a cowardly way.
– derivatives
wimpish adjective,
wimpishly adverb,
wimpishness noun,
wimpy adjective (wimpier, wimpiest).
wimpish adjective,
wimpishly adverb,
wimpishness noun,
wimpy adjective (wimpier, wimpiest).
'wimpy' also found in these Oxford entries:

