toying (Noun) — Playful behaviour intended to arouse sexual interest.
toying (Verb) — Behave carelessly or indifferently. ex. "toy about with a young girl's affection"
toying (Verb) — Manipulate manually or in one's mind or imagination. ex. "Don't toy with the screws"
toying (Verb) — Engage in an activity as if it were a game rather than take it seriously. ex. "toy with an idea"