on the uptake

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
References in classic literature ?
And in the South Seas garnered a better vocabulary from the lexicon of Love," Percival was quick on the uptake.