Contraction
-OF-
Viruses
IS-
Dangerous
100

This shortened “am not” is still considered informal.

ain't

100

This is a cheaper imitation of the genuine article.

Knockoff

100

This dance craze shares a name with an NYC neighborhood.

The Harlem Shake

100

This policy advocates non-participation in international relations.

Isolationism

100

An estimated 64,500 children aged 5-19 are treated in U.S. hospital emergency departments each year for injuries relating to this pastime.

Skateboarding

200

This pronoun is mainly associated with the American South.

Y'all

200

An employee whose main duty is running errands is called this.

Gofer

200

This handheld digital pet sold over 76 million units by 2010.

Tamagotchi

200

This type of triangle has 2 equal sides and 2 equal angles.

Isosceles

200

Despite the common assumption, this extreme sport only has about a 1/100,000 chance of fatality.

Skydiving

300

This word appears twice in the lyrics of "The Star-Spangled Banner."

o'er

300

The rule against occupying an illegal position, beyond a prescribed area or ahead of the ball/puck on the playing field, is called ______.

Offsides

300

This 3-D combination puzzle, named for its creator, was invented in 1974.

Rubik's cube

300

This narrow landform has water on both sides and connects two larger land areas.

Isthmus

300

This is the official term for a severe allergic reaction.

Anaphylaxis

400

"_____ a consummation / devoutly to be wish'd."

'tis

400

This kind of bed offers extra floor space.

Loft

400

This trend is never going to give you up.

Rickrolling

400

This type of crustacean has 7 pairs of legs.

Isopod

400

Famously, the odds of being crushed to death by this large object falling over are higher than being killed in a shark attack.

Vending machine

500

"Goodbye" is a corruption of this phrase.

God be with ye

500

This tiny tube-like protein structure is found in cytoplasm and is involved in cell movement.

Microfilament
500

This was the highest-grossing movie of the 1990s.

Titanic

500

This adjective means being of identical or similar form, shape, or structure.

Isomorphic

500

This lifesaving technique had to undergo a name change after a controversy between the innovator and the Red Cross.

Heimlich Maneuver