the reverse equivalent of a "motorboat".

A person accepts a mans soft genitals into their mouth and vigorously shakes their head back and fourth while producing various sounds from the throat; used to prepare a man for (oral) sex.
"I just couldn't get in position so she suggested a knobbler to get the process started. Within moments I was ready for her"
by anonymous2587 November 19, 2013
Get the mug
Get a knobbler mug for your daughter-in-law Jovana.