man 1: stacy gave the best blow-n-blow last night  man 2: how so?  man 1: the fat line of coke made her blow me like a champ
to simultaneous snort cocaine off of a man's penis while inserting it into one's mouth
"man 1: stacy gave the best blow-n-blow last night  man 2: how so?  man 1: the fat line of coke made her blow me like a champ" What is the definition of "blow-n-blow"?