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A usually green (can be yellow or red, depending on the Sim), diamond-shaped parallelogram over the head of a Sim character from the two best-selling PC games of all time, The Sims and The Sims 2, that depicts the mood that specific Sim is in.
Sim 1: Hi, I have a green plumbob. I am happy.

Sim 2: Hi, I have a yellow plumbob. I am not too happy, not too sad.

Sim 3: Hi, my plumbob is red and I suggest you fuck off before I rip your asshole apart because I'm angry.
plumbob by Crunkay July 27, 2005

Plumb Job 

To thoroughly cover a females fine ass with your favorite scented lotion and screw her crack like there's no tomorrow until orgasm. No penetration is necessary.
She was working under the sink one day and her low rise jeans began to fall. That plumbers crack was irrestable. I reached for the Jergens next to the sink and let the white devil out of the bottle. Her crack being well greased, I unleashed my flesh devil onto her Grand Canyon. Bliss was obtained in the next 15 seconds.
Plumb Job by Andy!!! December 10, 2004

plumbjoinerist 

Either a DIY Ethuiast who thinks there good at plumbing and joinery and isn't or a joiner who thinks he's good at plumbing or a plumber who thinks he's good at joinery and isn't!
Look at state of plumboinerist fucking bodging . That Plumbjoinerist has put a fall on that picture rail so it drains!
plumbjoinerist by Mrtwatface February 21, 2018

Plumbobbing 

When someone wears specific clothes to let everyone know the mood they're in.
Sindy: "Maybe I should go talk to Ashleigh. Look at that black hoodie; she's totally plumbobbing her sadness.
The forceful act of receiving a rimjob (licking of the anus) as an act of hazing. Typically performed on freshmen or pledges.
Hey Plumer, you just forced a rimjob on that kid." "Yeah man you just gave him a Plumjob."
Plumjob by pcrazie March 15, 2011
1. The name given to either a random thingamabob or do-what that is so completely useless to the average civilian that it is not worthy of a intelligent response.

2. Plumbob can also be used as an insult aimed at someone guilty of committing a totally embarrassing action.
Yeah he's a right plumbob man.
Plumbob by PureInsanityLoop March 8, 2011