Meaning You still there
Type Acronym
Rank ★ ★ ☆  Average
Usage Online Only (chat, messaging, e-mail)
Comments YST may be used while text messaging when the other person hasn't responded in awhile. It is a quick way of asking if he or she is still checking messages. It may also be used in an online chat session to ask of the person is still at his or her computer.
Example "YST? TMB when u get this."
Updated October 3, 2016