a vain or arrogant person.

Origin of swellhead

An Americanism dating back to 1835–45; swell + head
Related formsswell·head·ed, adjectiveswell·head·ed·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for swell-headed

Historical Examples of swell-headed

  • Only don't get swell-headed enough to think you're a man, agin.

    Flying U Ranch

    B. M. Bower

  • He was dead sure he, for one, wasn't going to make a fool of himself over any swell-headed politician.

    Lonesome Land

    B. M. Bower

  • "So here's our swell-headed crook of an engineer butting in again," he sneered.

    The Iron Furrow

    George C. Shedd