Is is American English skateboarding
slang for performing well -- what is known in automobile slang as "firing on all cylinders", in tennis slang as "being in the zone", or perhaps in martial arts as having "mind, body, and
soul" in
harmony.
"I couldn't believe it when he landed that
720 heelflip coming off the half-
pipe and went straight back down again - he was really gleaming the cube
today!"