Based on lyrical evidence, this term refers to those that visit a club and, instead of dancing and being sociable, remain out the outskirts of the dance floor, away from the 'action.'
A more traditional term for this behavior is 'wallflower.'
However, as evidenced in 'Everytime Tha Beat Drop' example below, 'holding up the wall' may also refer to a case where an individual requests that another engage in an activity only to be turned down due to (occasionally perceived) social or financial status (i.e. the archetypal 'girl that's too good for you').
"I'm soon to motivate the room ... If you holdin' up the wall, then you missin' the point." -Pharoahe Monch - Simon Says
"Cause I ain't one of these too bourgeois broads /
Always in the club holding up the wall" -Monica featuring Dem Franchize Boyz, Everytime Tha Beat Drop
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 murdererused a serrated blade.
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 peecalculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).