Wimp

Wimp was a word for people without courage, similar to coward.

The Eleventh Doctor claimed that patience was for wimps. (TV: The Power of Three)

When the Renegade Daleks returned to base because of the Imperial Dalek's arrival, Ace called them wimps. (TV: Remembrance of the Daleks)

Information from invalid sources
A Cyberman allergic to silver, an Ice Warrior that got chilblains, and a yuppie Yeti were all considered "wimp monsters". (NOTVALID: Doctor Who? 157)