A gickle is when you start laughing at a girl who is tickling a retarded, one legged dwarf (in a special place).
My boyfriend and I gickled so hard when Jenny tickled stan (the retarded, one legged dwarf).
This is used when it is undecided if the slices of green veg in you big mag is a pickle or a gherkin
Or used as a sexual innuendo
Urgh...i asked for no gickle in my big mac...
I cant wait to come home and gickle you tonight