To screw up.
Greg tried to make dinner but he totally junked (it) up and burnt everything.
Dan junked up his elbow and shoulder learning to snowboard.
Dan junked up his elbow and shoulder learning to snowboard.
by skryblz March 26, 2009
Shae's attempt to provide an example for this word resulted in failsmanship because he junked it up so bad.
by skryblz March 26, 2009