The Full form of SYM is shut your mouth, or SYM stands for shut your mouth, or the full name of given abbreviation is shut your mouth.
SYM (shut your mouth)
shut your mouth is known as SYM.
SYM all full forms
All the above full forms are related to SYM. A little information is given about one of these full forms. If you are not satisfied with the information given about 'shut your mouth (SYM)', then comment. Or if you know more about 'shut your mouth (SYM)', then write.