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Full Head of Steam 

In basketball, when a player has high speed and momentum. Usually used to describe large players driving to the goal for a dunk.

Originates from confused basketball announcers mixing up their words when trying to describe a player as moving “full steam ahead” before entering common usage.

Sometimes described as simply a “head of steam”.
Giannis is tearing down the court with a full head of steam!

Not many people are going to be willing to take a charge when LeBron gets a head of steam toward the goal.
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Full Head Of Steam 

Phrase. To be seriously, dangerously and hilariously drunk.

Not location-specific; out with friends, on a date, at work - nowhere is safe from one of the lads getting a full head of steam up and running riot.

Interchangeable with;
- Massive Head Of Steam Up
- Fully Steamed

Superlative;
- World Record Head Of Steam Up
- Hey, did you see Ross last night?

- OMG yeah, he had a full head of steam up - I think he got arrested!
- What for?
- Everything...

Full Head Of Steam 

Phrase. To be seriously, dangerously and hilariously drunk.

Not location-specific; out with friends, on a date, at work - nowhere is safe from one of the lads getting a full head of steam up and running riot.

Interchangeable with;
- Massive Head Of Steam Up
- Fully Steamed

Superlative;
- World Record Head Of Steam Up
- Hey, did you see Ross last night?

- OMG yeah, he had a full head of steam up - I think he got arrested!
- What for?
- Everything...
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trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
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British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
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Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
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