i aint gonna lie - A big show-off way of saying you're going to say something,

A big show-off way of saying you're going to say something, even though it's probably not true. Like a kid who thinks they're cool.

I aint gonna lie, I told my teacher I did my homework, but I didn't.

I aint gonna lie, I said I was going to clean my room, but I was watching TikTok.

I aint gonna lie, I told my friend I had money, but I was broke.