To inflict
oral sex on a partner voraciously. A partner, for a normal blowjob, will go
up and down, but when your partner "swings that neck", it involves a wide range of motion for suckage to occur.
example: a fast, almost violent, circular or
triangular motion.
Swing That Neck: a
vicious, fast, and movement filled blowjob, where the partner sucking will go ape shit
on the dick.
"She didn't just suck it man, she swung that neck. It was crazy. "