TICKLE (3)

Tic″kle, a. 1. 1. Ticklish; easily tickled.
2. 2. Liable to change; uncertain; inconstant.
The world is now full tickle, sikerly. Chaucer. So tickle is the state of earthy things. Spenser. 3. 3. Wavering, or liable to waver and fall at the slightest touch; unstable; easily overthrown.
Thy head stands so tickle on thy shoulders, that a milkmaid, if she be in love, may sigh it off. Shak.