To give a blow-job, head. to give fellatio. A session of giving head or fellatio.
can also be refered to as "chop-dizo" or "chop-dizzle"
"hey girl, I need a chop down"
"yeah, i'll do that, right after you hook it up with some chop-dizzles"
(this term was born in Salem Oregon, among a large number of cliques)