drinks coaster
A small mat placed under a glass or cup to protect the table surface.
Please put a coaster on the table before placing the glass.
Shortened form of ジェットコースター; common in casual speech.
See also: ジェットコースター
I heard that roller coaster at the amusement park is really scary.
coaster brake
Abbreviation of コースターブレーキ; a back-pedal brake on a bicycle. Technical term used among cyclists.
See also: コースターブレーキ
This bike has a coaster brake, so it stops when you pedal backwards.
I put the glass on the coaster.
I rode the most popular roller coaster at the amusement park.
I laid out a coaster on the table before setting down the drink.