An opened but unfinished can of beer left out until it's warm. A full royball is a beer that has been opened and then never touched again. Royballs are considered a huge waste of beer and an act that brands you as a pussy. Understandably, the last sip is considered backwash, sauce, foam, froth, or some other undesirable description and it is o.k. to leave a tiny bit in the can equivalent to a sip. Anything more than a sip left in the can is considered a royball. An addendum to the "man-code" should be: thou shall not leave royballs.
I found like 30 royballs while helping clean up after Farney's party. One of them spilt on my shirt and there was 3 cigarette butts in it, I almost puked.
by sonicturkey April 17, 2006

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×