billy didn't have a tissue handy, but a quick bushman's blow was all that he needed to rid himself of that pesky [snot] flow
the act of riding one's nose of nasal debris using only a nose, a lung and a finger
"billy didn't have a tissue handy, but a quick bushman's blow was all that he needed to rid himself of that pesky [snot] flow" What is the definition of "bushman's blow"?