When someone shares the same plane of movement with you in a paralell manner, usually very annoying. Happens mostly while driving, when one drives next to you, speeding up as you speed up and slowing down when you slow down, preventing you from changing lanes. Also happens while walking down the street, waiting in line, or jogging somewhere populated.
I was gonna get off at the last exit but that motherfucker in Tauras kept partylining me so I couldn't get over.
Hey I think that guy in the blue shorts has something for me. Everytime I get up to run a lap he keeps catching up and partylining me. It's really uncomfortable!