Are quick on the uptake - Idioms by The Free Dictionary
be quick on the uptake (redirected from are quick on the uptake)
be quick on the uptake
To be able to grasp or understand something easily. She's pretty quick on the uptake, so I'm sure she'll figure out the directions you left her.
be quick (or slow) on the uptake be quick (or slow) to understand something. informal
be ˌquick/ˌslow on the ˈuptake (informal) understand things quickly/understand even simple things with difficulty: He’s a very good worker but he’s a bit slow on the uptake sometimes. You have to explain everything twice.