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1.
A BMX and skateboarding trick in which the rider/skater jumps from the ground and rides/skates on a wall--hence the term "wallride."
Dude, I can wallride on my bike, but I can't wallride on Jeff's skateboard.
by probe joe September 22, 2004
 
2.
When your dancing with a girl and she takes you over to a wall and grinds on you while you stand back comfortably and do little work
"Dude last night I got like 5 wall rides at the party"
by cockran February 22, 2013