look up any word, like cunt:
 
1.
Reply to anything that has made you think too hard or just weird.
Person 1: "This one time, at band camp..."
Person 2: "Ok then"
by Angry Salamander October 18, 2005
 
2.
Antonia's catchphrase which means you have said something weird or have mentally disturbed her
Boy: Omg your moms bed is nice

Antonia:Ok then
by Omgitsmauro October 13, 2014