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