Back Alley Sally 

A cheap hooker found in a worn out area

Do you take me for some back alley Sally? Fuck off.

Tom here was fucking some back alley Sally last night.

Back Alley Sally by Mother of Madness February 6, 2017

back alley Sally 

To leave some sort of engagement (a party, bar, wedding reception, etc.) without saying goodbye or having anyone notice until well after you are gone. Usually done if the individual is too drunk or tired to go on, but doesn't want anybody to know.

1- "Hey! Anyone seen Buddy?"
2- "No, not for an hour or so... must've pulled a back alley Sally!"

back alley Sally by Woodenhead July 30, 2008

Back Alley Sally 

To sneak up behind the opponent.

1. You guys go the right, im going to Back Alley Sally them.

Back Alley Sally by LETHleader October 3, 2012