motor-boating
/ˈməʊtəbəʊtɪŋ/noun
1The action of driving or travelling in a motor boat, especially as a sport or leisure pursuit.
2 Electronics. Oscillation in an amplifier that is of such low frequency that individual cycles may be heard, giving a characteristic sound, and caused by feedback from the output to the input of earlier stages, often through a common voltage supply.
Origin
Early 20th century; earliest use found in The Oakland Tribune. From motor boat + -ing, after boating.