Something freaky is so weird that it's almost scary. If you have a freaky dream, you might wake with a frightened gasp.

Very strange looking animals are freaky, and creepy stories told at night around a campfire are best when they're a little freaky. An uncanny coincidence is freaky, and so are many Halloween costumes. The adjective is an informal way to say "bizarre" or "peculiar." It comes from freak, but the ultimate origin is unknown — although freak originally meant "a very sudden turn of mind."

Definitions of freaky

adj strange and somewhat frightening

“the whole experience was really freaky
strange, unusual
being definitely out of the ordinary and unexpected; slightly odd or even a bit weird

adj conspicuously or grossly unconventional or unusual

bizarre, eccentric, flakey, flaky, freakish, gonzo, off-the-wall, outlandish, outre
not conventional or conformist