nah dude, nah
It’s like saying no but with extra laziness. You say it when you’re too tired to even think straight.
Nah dude, nah. I’m not coming to your dumb sleepover. I’m sleeping.
Nah dude, nah. I’m not texting you back. I’m dead.
Nah dude, nah. I’m not doing your math homework. I hate math.