dabble

Concise Oxford English Dictionary © 2008 Oxford University Press:
dabble/ˈdabl/

▶verb

• 1 move (one's hands or feet) around gently in water.

  ■ (of a duck or other waterbird) move the bill around in shallow water while feeding.

• 2 (often dabble in) take part in an activity in a casual or superficial way.

– derivatives
dabbler noun.

– origin C16: from obs. Du. dabbelen, or a frequentative of dab1.