|Origin:||Perhaps from tick 'to touch lightly' (16-19 centuries)|
to move your fingers gently over someone's body in order to make them laugh:
Stop tickling me!
2 [intransitive and transitive]
if something touching your body tickles you, it makes you want to rub your body because it is slightly uncomfortable:
Mommy, this blanket tickles.
Mazie's fur collar was tickling her neck.
if a situation, remark etc tickles you, it amuses or pleases you
be tickled pink (=be very pleased or amused)
The kids were tickled pink to see you on TV!
if something tickles your fancy, you want to have it or to try doing it:
If I see something that tickles my fancy, I'm going to buy it.