Ok, so it's a crooked grind by bike standards.
Lemme explain why there are almost no crooked grinds by skateboard standards on scooters.
A nose grind is a front truck grind.
A crooked grind is a front truck grind with the back truck hanging away from the ledge/rail.
An overcrooked grind is a front truck grind with the back truck hanging OVER the ledge, or over the opposite side of the rail.
Scooters doing pegless nosegrinds (NOT NOSEBLUNTS) are almost always overcrooked grinds because the wheel will automatically hang over the ledge, etc.
A crooked grind on a scooter by skateboarding standards is not possible on ledges (for probably 99% of all riders, never personally seen one done) because the back of the deck would be hanging away from the ledge. However, this would require that the wheel/fork is on the opposite side of the edge that is being grinded. This means that skateboarding crooked grinds are possible on scooters, except only on rails (or ledges if you're a fucking god).
That picture is a BMX crooked grind and we need two separate names for these grinds so we can differentiate without confusion between riders.
Personally I think the picture looks like a bad boardslide though.