Term used in the early 20th century to refer to homeless people traveling back and forth on Subway trains for the day. Traveling back and forth with no purpose but to take up time. Used extensively in the novel V. by Thomas Pynchon.
I had no where to go, so I spent the day yo-yoing.
The act of dribbling a yo-yo into a woman's vagina without any friction or hindrance. This is only achievable if the woman's vagina is excessively large, usually as a result of birthing multiple children.
Dude, I hooked up with this MILF and she was so loose I could have practised my yo-yoing!