Verb (5-dan, ぶ, transitive)
1. to play with (a toy, one's hair, etc.); to fiddle with
俺はなんとなく手で弄んでいたスマホをテーブルの上に置いた。I put the smartphone I'd been absent-mindedly fiddling with down on the table.
2. to toy with (another's emotions, etc.); to trifle with
私の心を弄んだな！You toyed with my heart!
3. to do with something as one pleases
4. to appreciate