1. Strange and somewhat frightening
   "the whole experience was really freaky"
    
2. Conspicuously or grossly unconventional or unusual
   "He was famed for his freaky choice of hats";
   - bizarre, eccentric, freakish, flaky [informal], flakey [informal], gonzo [N. Amer, informal], off-the-wall [informal], outlandish, outré

Derived forms: freakiest, freakier

See also: oddball, strange, unconventional, unusual

Encyclopedia: Freaky