When a male repeatedly inserts and removes his penis from a woman's anus to the point where the outer part of the rectum has folded and extended to the outside part of the asshole.
Dude, I gave my gf one of those Boston Pop Sockets she's always been asking for last night.
When a girl inserts her pinkie in your urethra
I got a Boston crowbar at the swingers convention and now it burns when I pee
(Optional) Go to Massachusetts, meet a gal at a bar. Maybe without having showered.
Get head from a massive large amount of brick colored lipstick mouth, with ball sucking as well.
Enter conjugation. When ready to ejaculate pull out, point the member up so that the expexctorit drips down itself and especially onto the testes.
Resume receiving fire engine red lipstick smeared head with attention to man eggs.
John: Man, she cleaned my grimey, red-smudged Boston Baked Bean Nuts shaft like it was candy
The act of fornication with both partners standing facing a wall. The partner directly facing the wall will then raise his/her legs and begin the tedious task of of climbing said wall while maintaining fornication and balance. Caution; the climbee must be very limber.
I gave your sister a Boston Wall Crawl until her feet were touching the ceiling! Good look getting those footprints down.
Like a Boston Marriage, but much less platonic.
"Hey, is that your girlfriend?"
"We prefer the term Boston Roommates when we're in the Deep South."
The act of collecting and freezing your smegma into a rod shape then inserting it into your male partners anus
"I gave JJ a Boston frosty after the sports game last night."
"Logan's favorite adult activity is a Boston frosty"