What is Mkey?
1.
mkey is a short form for "mhhhhm okey"
As like "k" it's an online term of acknowledgement; esp. without particular interest.
For example you just asked a question about something you don't really want to know just to keep on the conversation. You get an random answer and you type "mkey".
a: what do you do this afternoon
b: i go shopping
a: mkey
See
