on the uptake

quick on the uptake

Able to grasp or understand something very quickly and easily. She's pretty quick on the uptake, so I'm sure she'll figure out the directions you left her. This is a fast-paced environment, so you'll need to be quick on the uptake from the moment you start the job.
See also: on, quick, uptake
Farlex Dictionary of Idioms.

on the uptake

In understanding or comprehension. This term is most often put as quick on the uptake, for readily understanding something, and slow on the uptake, for being slow to comprehend. For example, Shirley will have no trouble learning that new computer program-she's very quick on the uptake . It alludes to absorbing ("taking up") information. [Early 1800s]
See also: on, uptake
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • quick on the uptake
  • be quick on the uptake
  • have a mind as sharp as a steel trap
  • have a mind like a steel trap
  • mind like a steel trap, have a
  • (as) sharp as a steel trap
  • a bit obtuse
  • be across (something)
  • be across something
  • cotton on to (something)
References in classic literature
"And in the South Seas garnered a better vocabulary from the lexicon of Love," Percival was quick on the uptake.