An automobile which is old, worn-out, slow, or otherwise of poor quality.
A British Rail Class 66 locomotive.
Origin
From Middle English scheden, schede, from Old English scēadan, scādan, from Proto-West Germanic *skaiþan, from Proto-Germanic *skaiþaną (compare West Frisian skiede, Dutch and German scheiden), from Proto-Indo-European *skeyt-, from *skey-.
See also Welsh chwydu, Lithuanian skėsti, skíesti, Old Church Slavonic цѣдити, Ancient Greek σχίζω, Old Armenian ցտեմ, Sanskrit च्यति). Related to shoad, shit.
From Middle English sched, schede, schad, from a combination of Old English scēada ("a parting of the hair, top of the head") and Old English ġesċēad.