Top Definition
when all of the blood inside a partially erect penis flows to the tip, enlarging it to unconventional proportions, turning it purple, while throbbing to your pulse; while the rest of the penis, see shaft, stays normal size
"bro what the fuck! my tips turning purple, and i think its gonna blow!"
"shit guys, we got a purple throb"
by thegrandmalik22 October 21, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.