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1.
1. A gym machine used to keep fit.

2. a suggestive word often used by mothers to their kids to get off the internet, quit webcamming and being a luvoe and get on the damn treadmill, and start sweating it off.
"ahh marcie alis ka nga dyan, at mag treadmill ka naman, webcam na webcam ka dyan eh"

translates: " ahhh marcie get out of here, and get on the bloody treadmill will ya you sheila and get off the damn webcam"
by m0oks March 17, 2008
 
2.
The definition of being a Graphic Designer. Make the design, show the design, customer changes the design, make the changes, show the changes, customer changes the changes back to the first design, change things back, show first design, customer changes the design to whole new direction, make new design, show new design, customer changes design back to first one... and on and on and on.
Good God that agency has got me running on the damn treadmill. By the time they pick a design I'll have retired.
by Kyle Bellamy December 11, 2006
 
3.
A secret code name used for when you are fuckin your ex boyfriends best friend.
"My god, my treadmill is fuckin crazy in bed."
"Last night my treadmill and I had a great fuckin work out...he has a big cock"
by porcupine November 24, 2003
 
4.
when you are having sex in the same manner for extended periods of time
i was treadmillin' dat hoe all night
by allthemhatersbejockinme February 07, 2008