DictionarypipsqueakInsignificant person
noun

pipsqueak

PIP-skweek/ˈpɪpskwiːk/

A person regarded as small, weak, or unimportant.

The short man's exaggerated flexing makes him look like a pipsqueak beside her.

A very short, slight adult man makes an exaggerated muscle-flexing pose beside a much taller, sturdily built older woman whose skeptical downward glance makes his attempt to look imposing fall flat.
Etymology

A pip and a squeak suggest the trivial noise of a young or weak creature. Applied contemptuously to people, that image makes them seem insignificant or unimpressive.

In context

Old Time Radio Researchers14:53
you pipsqueak weigh not as much as the smallest of our bands silence here
Family Theater - Robin Hood

More examples

  • She refuses to let the loudmouthed pipsqueak intimidate her.
  • He resents being treated like an unimportant pipsqueak.
  • The manager dismisses the young assistant as a pipsqueak.

Forms

pipsqueak · pipsqueaks

Similar words

weakling
More specifically criticizes a lack of strength.
nobody
Nobody dismisses someone as unimportant; pipsqueak additionally suggests smallness or weakness.