Lacknowledgement
When you and your friend both pretend you don't know each other in front of everyone, even though you're besties.
At the mall, my buddy and I saw each other, but we just walked past like strangers.
In class, my friend and I sat next to each other but didn't talk the whole period.
At the party, we saw each other but waved like we were pretending we didn't know each other.