A slam sack is a body used for fucking. This usually refers to females, but has come to encompass anyone who fits the description.
David: I am heading out to the bar to hopefully find a chick for tonight.
Kate: Are you looking for a girlfriend?
David: Nah, just looking for a slam sack.
Slamming and sex are part
of life for some gay men, and drugs like tina (crystal meth), ketamine, mephedrone and new substances like 3-mmc, mxe and 4-mec are being injected before and during sex sessions.
The effect of slamming is very intense, and for me it is equivalent to freedom... I feel liberated from past sexual issues.
Arnold: Did you go to that party last night, George?!
George: Yeah! It was slamming!
The act of absolutely destroying Austin Glasspoles fat ugly mrs.
I will be slamming Gnomes ugly mrs later today
when your friend is tryin to get with a hot bitch you say this
yo mah nigga i saw you talking to Jameka. Tryin to slam?
Slamming hips together: a line used when trying to pick up girls to take home or on your girl to induce sexual intercourse
Johnny in the club: "Hey, girl wanna go slam hips together at my place?"