The act of one
male putting his genitals, both dick and
balls, into the mouth of another
male or female.
Example 1:
I heard these horrible
wet retching fallowed by gagging sounds the other
day but it turned out to be someone getting roadblocked.
Example 2:
Steven: Hey Andrew. Want to
get roadblocked again?
Andrew: Sure!
Steven: Say "Ahhhhh."