"Radibonzical" is a combination of "radical" and "bonz".
Both
words are adjectives which mean "excellent", "exceptional", or"
awesome".
This combination is used in the context of
skateboarding, BMX, snowboarding, and other youth-culture acrobatic sports.
Used to describe a combination-move in which each component might independently be termed "radical" or "bonz".
These two moves performed simultaneously deserve the superlative form, "radibonzical".
Skater A: "
Dude, here's the YouTube vid of Tony Hawk doing 720 from fakie. Watch, this is so radical,
dude."
Skater B: "No, that's an Indy 720. Combines 720 and Indy together."
Skater A: "Whoa, RADIBONZICAL."