The phrase "gentle tap" means a light and soft touch or hit.
Sentences with «gentle tap»
This is most obvious on the left side and gentle tapping of the swelling just behind the last rib often produces hollow, drum - like sounds. (michigananimalhospital.com)
Step 3: Use rapid, gentle tapping motions to blend the formula into the skin. (makeup.com)
When pounding the pork into cutlets, use gentle taps with a heavy mallet, heavy pounding may tear the meat. (simplylivinghealthy.org)