This object can complete a lot of idioms.. it can be in your court, you could drop it, or you could be on it.
Ball
Just scoop ice cream on root beer for this type of beverage
Float
There were 13 guests in attendance at this biblical event, perhaps where the idea of 13 being unlucky came from
The Last Supper
When I ask if you have this kind of pain, I mean is it sharp or sudden, not from an angle of less than 90 degrees
acute
After this couple's first date in 1894, she went home to Poland while he wrote her letters about his "dream for science"
Marie Curie & Pierre Curie
Someone of unappealing visage is said to have "a face for" this medium; Fred Allen said it of himself
radio
Serling or Steiger
Rod
friggatriskaidekaphobia or paraskevidekatriaphobia is the fear of this...
Friday the 13th
I'm afraid you've broken a brachial bone, brachial meaning a part of this body part
your arm
In Tarsus in 41 B.C. Cleopatra wooed this beefy Roman by arriving to a date dressed as Venus
Marc Antony
You'll find the French word for "beautiful" in this phrase for the most attractive person in a given setting
belle of the ball
"A well-known conjecture is that" this friendly word "was a familiar abbreviation of chamber-fellow"
chum
Skipping floor 13
I've got one of these forecasts for you, from Greek for "prediction"
prognosis
In the summer of 1989, this not-yet-famous couple went on a movie date in Chicago & saw a Spike Lee film
the Obamas
In a sporty idiom, to make expectations higher is to do this, from field events like the pole vault
raise the bar
This baseball pitch gets batters to hit a lot of ground balls
a sinker
The master of suspense was born on August 13, 1899 - He made his directorial debut in 1922 with a movie called Number 13.
Alfred Hitchcock
When I say this is "thready", I mean it's barely perceptible under my finger
a pulse
On one of this duo's early dates in 1930, he crashed on her couch & in the morning, the Dallas police arrested him
Bonnie & Clyde
This 2-part phrase meaning "completely settled" could be the name of a salon
Cut and dried
In computing, it's an acronym for a transfer of data to a temporary storage area
a spool(ing)
The star of the Friday the 13th movies, one of the highest-grossing films of all time
Jason Voorhees
I need to examine your ear--hold on while I grab this doohickey with a handle & a light that lets me look inside
an otoscope
A tale of a medieval hookup: this pair met in Paris around 1115, had a son, but lived on separated as monk & nun
Abelard & Héloïse