Definition from Wiktionary, the free dictionary
zipline + -ing
- The recreational activity of travelling on ziplines.
2008 May 6, Katie Zezima, “Can M-U-D Really Spell M-O-N-E-Y?”, in New York Times:
- The inn also offers adventure packages, including ziplining and a truck safari, where a military vehicle chugs up the side of a muddy mountain.