Old Betsey 

Older mans' name for his car, or sometimes cane or walker. It's the thing that gets him around. Thought to be a derivation of a name originally referring to a horse.

Dad's still getting around pretty good with old betsey.

Old Betsey by Jonaog March 11, 2008

Old Betsy 

Something old looking and/or barely functioning.

"Look Ma, Joe got Old Betsy run'n."

Old Betsy by 123_not_it July 23, 2016