jumping and doing a high five with both hands while hitting eachothers shoes together, doing this all in the air.
"good job man! that call for a high twenty!"
Similar to a High ten (where both hands are used as opposed to the one for a high five,) but also includes a jump by both participants. During this time the four hands AND FOUR FEET are brought together to create the high twenty.
Reserved for moments of unparalleled levels of awesome.
A: "Hot biscuits! that was AWESOME!"
B: "Booyah! High Five!"
A: "High five? That deserves a high twenty!"