pat, touch, stroke
Nab Nab Nab maybe to tap
Tap
Tap your brakes lightly to warn the vehicle
tap
softly, lightly and mildly
Tap
tap dancing?
lightly tap your brakes
The homonym of "tap" is "tap," which can refer to the action of lightly striking something or to a device used to control the flow of liquids, such as a faucet.
plug, tap, gate, pipe, lid
Three answers that immediately come to mind though there are of coarse many more meanings. One is will you lightly tap me on the shoulder when so and so appears. The other is, would you tap (Borrow off) me for 10 dollars if you were in need?. Another is, would you tap into my pocket to steal my money?
tap the foot-brake lightly