Slow on the uptake
To be slow to figure something out.The new employee is slow on the uptake and we must explain everything to him at least two times.
Slow on the draw
To be slow in drawing a gun or in doing something.The man is slow on the draw and never takes advantage of opportunities.
Slow down
To go more slowly than usual, to cause something to reduce speed.You should slow down when you are driving on a wet road.
Slow as molasses in January
Very slow.The little girl is as slow as molasses in January and she never gets her work done on time.
Slip up
To make a mistake.I slipped up when I said that I would not go to the meeting next week.
Slip through (someone’s) fingers
To get away from someone.My friend had a very good opportunity but it slipped through his fingers because of his lack of action.
Slip out
To allow a piece of (secret) information to be revealed.It slipped out that the government is planning to close the large downtown hospital.
Slip out
To go away, to leave quietly or secretly.I slipped out for a few minutes to buy some milk.
Slip one`s mind
To be forgotten."I am very sorry that I did not meet you last night but our appointment slipped my mind."
Slip off
To go away or escape quietly or secretly.I slipped off after the lecture and went home.