sticky

Concise Oxford English Dictionary © 2008 Oxford University Press:
sticky/ˈstɪki/

▶adjective (stickier, stickiest)

• 1 tending or designed to stick; adhesive.

  ■ glutinous; viscous.

• 2 (of the weather) hot and humid; muggy.

• 3 damp with sweat.

• 4 informal difficult; awkward.

• 5 informal (of a website) attracting a long visit or repeat visits from users.

▶noun a piece of yellow paper with an adhesive strip on one side, used for leaving notes.

– phrases
come to a sticky end be led by one's own actions to ruin or an unpleasant death.
sticky fingers informal a propensity to steal.

– derivatives
stickily adverb,
stickiness noun.