'Ex' cellent
With the power of a million tornadoes, it's a description that overstates reality for effect.
Exaggeration
To invent a new word or phrase is to do this - makes cents.
To coin
The fissure of Rolando is found in the topmost & probably important most part of the brain.
Cerebrum
"D'Oh!"
The Simpsons
LXXVIII
Seventy-Eight
In math, it indicates the number of times an expression is multiplied by itself.
Exponent
Meaning "false step" in French, it's a socially embarrassing act or remark.
A faux pas
The corpus luteum in these organs secretes estrogen & progesterone.
Ovaries
"Yabba dabba doo!"
The Flintstones
I could have had this type of internal-combustion engine with 2 opposed banks of 4 cylinders.
A V-eight
A concentrated substance used in chemistry or cooking.
Extract
To achieve something by this or by this means you do it by any means necessary, by fair or foul ways.
By hook or by crook
Each of these organs is encased in a sac called the pleure.
Lungs
"Bazinga!"
The Big Bang Theory
A 134 pound boxer, or someone who can't hold their booze.
Lightweight
Like a foot or hand, it's a part of something that is the farthest from the main part.
Extremities
"He who pays the piper holds the reins" is an example this, incorrectly fusing 2 symbolic comparisons.
A mixed metaphor
If you want to be formal about it, "vermiform" precedes the name of this tube that seems to serve no purpose but can become inflated.
The appendix
"Noice!"
Brooklyn 99
An ice skating move, or a type of knot.
Someone who deliberately behaves in an extravagant way to attract attention.
From the Latin for "announce," this means to pronounce clearly and correctly.
Enunciate
The name of this internal organ is a synonym for ill humour or bad temper.
Spleen
"Sufferin' succotash!"
Looney Tunes
Perhaps foreign objects if you weren't around to enjoy music, they are named this way because each of the four programs is comprised of two songs playing simultaneously to provide stereo sound.
Eight-tracks