1. Conspicuously or grossly unconventional or unusual
   "He was famed for his gonzo choice of hats";
   - bizarre, eccentric, freakish, freaky [informal], flaky [informal], flakey [informal], off-the-wall [informal], outlandish, outré
    
2. (journalism) using an unconventional, exaggerated, or highly subjective style
   "His gonzo reporting mixed personal experiences with social commentar"

See also: unconventional

Encyclopedia: Gonzo