Alpha-numeric .
"Flipping the bird" is an expression that uses the word 'bird.' Another expression that uses the word is "killing two birds with one stone."
Alpha-numeric .
Blank expression.
Another word for it is "mounting". They do this less as a sexual expression and more as a display of superiority.
there
oho, aha
Another rational expression.
a killogram
A number or expression that can be multiplied to get another number or expression is called a factor.
A factor is a number or quantity that when multiplied with another produces a given number or expression.
Depending on the context, you might use 'clichés', 'trivialities', 'meaningless words', or a similar expression.
Yes.