To perform oral sex. When going down on a guy or a girl it's additionally customary to make the Pac-Man (Or Mrs. Pac-Man) sound of Wakka Wakka Wakka.
"Yo man, Jessica totally went Wakka Wakka Wakka on me last night. I made her wear the bow and everything."
"Last night when I went Wakka Wakka Wakka on Jim he made me actually make the noises and everything."
"Last night when I went Wakka Wakka Wakka on Jim he made me actually make the noises and everything."
by El Zacko May 18, 2007
 Get the Wakka Wakka Wakkamug.
Get the Wakka Wakka Wakkamug.