Some expressions that use the word 'out' are:
Ship shape
Weeping Willow
Sentence, expression, diction, slogan
oho, aha
"red in the face" is depectied in FAREDCE. If you take out the word "red" it leaves "face."
It is each TERM of the equation or expression
There really is no term used for those who invent words. Neologism is the word for a new word or expression.
what expression does not name an integer
"Flipping the bird" is an expression that uses the word 'bird.' Another expression that uses the word is "killing two birds with one stone."
expression = BITUI = ביטוי
The word for wearing a stern expression is "frowning" or "scowling."
The root word of Expression is "press". The word literally means "to press out", as in pressing out/putting out feelings or words.