What does :-s stand for?

:-s stands for "Don't know what to say"

How to abbreviate "Don't know what to say"?

"Don't know what to say" can be abbreviated as :-s

What is the meaning of :-s abbreviation?

The meaning of :-s abbreviation is "Don't know what to say"

What does :-s mean?

:-s as abbreviation means "Don't know what to say"