dirt surfing
when a man, opting for non-penetration, rubs his wriggle-stick between a girl's ass mountains.
dude, i heard adam was totally dirt surfing three girls last night. it made his weiner look like an angry mexican.
Dirt surf
To riding a One Wheel on a grassy or dirt surface, (trail, field, ect) while carving (zigzagging) in a very similar motion as noted in surfing, snowboarding, or skateboarding.
I found this sick trail on the All Trails app, Im heard out there know to Dirt Surf.