O.K...I can't resist.
The Mechanical Coupling Alignment pins on the M-1, M-3, M-7 have the nickname of "Bull's Pr*** [male appendage]". (The M-7's is even bigger girth than M-1/M-3 ).
When there is a defect with that particular part, some mechanics write the nickname on the defect sheet, without thinking. The defects are ultimately transposed into the RSMS system by clerks, who are sometimes female.
This invariably ends up in a blistering phone call to the shop.