Tossing your junk
Basicaly to masurbate

some other slang termss may include "Buffing the bannana" "bopping the bolony" "Chocking the chicken" "Cuffing the carrot" "Jerking off" "spanking the monkey" and "whipping the willy"
Guy1- "So were you tossing your junk all night last night after seeing that girl"
Guy2 "Hell yeah you bet I did mate she was so damn hot why did you?"
Guy1 "Ew no way dude that would be so gross that bitch was just bare ugly"