Other forms: trickier; trickiest
If something is tricky, it's difficult, like a tricky puzzle. And if a person is tricky, they're sneaky, skilled, or crafty, like a tricky magician who makes it look easy to pull quarters out of your ears.
A tricky riddle is extremely hard to figure out, and a tricky question on a math test is even trickier if you can't use a calculator to solve it. In their 1986 rap classic, "It's Tricky," Run-DMC claimed that "it's tricky...to rock a rhyme that's right on time" — or in other words, it's really difficult to write a clever rap lyric.