guy 1: hey she gives [good head] guy 2: dude, you just gave rory a blowjob by proxy  guy 1: wtf? guy 2: yeah, she gives lotsa guys bjs
anyone who hooks up with a girl at a [party] who gave a [blowjob] to anyone else earlier that week
"guy 1: hey she gives [good head] guy 2: dude, you just gave rory a blowjob by proxy  guy 1: wtf? guy 2: yeah, she gives lotsa guys bjs" What is the definition of "blowjob by proxy"?