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1.
1. The act of spewing forth profanities as if you were a dirty sailor.

2. using excessive profane, or vulgar language in an unacceptable setting

1."Grandma has a dirty sailor mouth... Shut the f*** up Timmy!"

2. "Oh I love it when you f*** my **** with your *** **** captain **** bucket **** *** jackhammer ****ed *** **** ****** **** rub my **** with a ****ing titmouse"
by Mr Eff October 31, 2007
 
2.
A permanent sperm taste in a persons mouth from overindulgence in man on man fellatio. Traditionally associated with the Navy.
Ian has been out of the Navy for 17 years and still suffers from sailor mouth.
by Dick C Normous February 11, 2010