Top Definition
The remnant of mustard left on the tip of the squeeze bottle that has dried up, forming a little cap.
After carefully peeling off the muscap and aiming the musquirt toward the drain, the actual mustard is now ready to be delivered to my hot dog.
by KnowsGuy March 27, 2011
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.

×