Simple past tense and past participle of tickle.(verb)
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Use "tickled" in a sentence
"The name tickled the back of my brain, but I couldn’t place it."
"Tibetan monks and Catholic nuns, for instance, have an inordinate ability to tap into the “god-spot” (the pop-science term) whenever they wish, while when Dr. Richard Dawkins had his brain tickled by neurological scientists he only reported a “headache.”"
"The name tickled a memory at the back of his mind, but it eluded him before he could bring it up to the surface."