A sexual act between a male and female in which the male enters his penis in both the female's vagina and anus in alternating fashion, much like the motion of a needle on a sewing machine.
Wanting to satisfy both of her holes, Bob gave Betty the sewing machine.
by Vee-nus June 12, 2008
(male variation) typically when one man uses the shaft of his penis to tickle the entire length of another man's penis by quickly tapping with the girth of penis #1 up and down the side of penis #2. This is called a sewing machine for the fast rhythmic pattern used by penis #1, also typicaly noted for making man with penis #2 hum with joy like a sewing machine.
Sometimes a man just needs the sewing machine to run on him for a while. Once you sew you wanna blow.
by Def king 5000 February 27, 2015