The act of getting your ass eaten out by a chick while you're taking a piss.
Did you and Stacy go all the way last night?
Nah she was tired so she just gave me a Canadian Blumpkin.
The act of taking a shit in a girl's mouth, then proceeding to receive a blowjob from said girl.
Yo Carla gave me a Columbian Lip Smacker last night and let me tell you it was kinkyyyy.