Impudent, insolent.
Showing willingness to take bold risks; recklessly daring.
Lenient, permissive.
Wild or uncontrolled.
Sketchy and flowing rather than geometric and precise.
Aimless
With open hand (as opposed to a fist).
Characterized by broad sweeping movements.
Involving wrist action.
Casual; undisciplined or haphazard.
Spendthrift, profligate.
With a poor grip.