flash on someone

flash on

1. To abruptly turn or go on, as of lights. As the man laughed manically, the lights in the haunted house flashed on, and we all ran out, screaming.
2. To illuminate someone or something. I repositioned my lamp so that it flashed on the things I'd dropped behind my bureau.
3. slang To think of or recall something. It took some time, but we finally flashed on a solution to that problem.
See also: flash, on

flash on someone

in. to get angry at someone. Don’t flash on me like that! I didn’t do it!
See also: flash, on, someone