What is Tickling?
1.
The act of stroking another's body lightly, so as to cause involuntary twitching, squirming, and laughter. Used for foreplay, fun, or torture.
Mark started tickling Sarah's feet until she screamed and cruied with laughter
2.
To lightly wiggle and move a key around inside a lock and/or use alternative instruments to open it. Generally it is applied to thieves from Ireland and England who "tickled the lock" hence its name.
Sam: "Damit this key won't open the lock" Joe: "Give it to me"
Sam: "what are you doing.."
Joe: "This is called tickling the lock"
See
3.
as in "gooch tickling"
1)when someone is doing something they shouldn't be doing or when what they are doing is annoying
2)what someone was doing when they were supposed to be hanging with you
Zopes! Stop tickling your gooch.
OR
"Where was he? Oh, he was tickling his gooch last night."
See