la-la-ing

making jokes about someone

Addi was la-la-ing about Kaveh

La La-ing

When you let someone think they've won something for five minutes, then reveal they actually lost.

A: "Did you win an Oscar last night?"
B: "I thought I did, but they were just La La-ing me."

tra-la-la-ing

When someone is out galavanting around at all hours of the night doing things they shouldn’t be doing and lying/backstabbing their significant other instead of acting like an adult and keeping their significant other in the loop and letting them know what’s really going on.

Well unfortunately Lonnell is out tra-la-la-ing again. You would think he would have learned his lesson by now that tra-la-la-ing behind my back is a terrible idea since I literally snap the f**k out on him when he does that disrespectful, sneaky bullshit.