Any object you can not describe because you are to stupid to remember the proper terminology OR a mechanical part that is machined for an unusual application and, therefore, not mass produced.
EXAMPLES: wing nut,
Can you grab me that drill, a #2 bit, two screws and that Fern Dobbler?
Well, here’s your problem, your Fern Dobbler is not aligned.
A)When talking about a girl with large boobs they are refered to as doubble big macs to limit akwardness. It can also be used to hide what you are saying if they are within hearing distance.
B)A greasy but delitious burger sold ad Mcdonalds.
Ex.1: Damn, That girls got doubble big macs
Ex.2: Man would realy like a girl with doubble big macs
Ex.3: I'm hungry, can we go to Mcdonalds and get some doubble big macs mommy?