nót - tódäy - búddÿ
Your friend asks you if you want to go to the movies. You reply "NT Bud." as saying "Not today buddy."
Can also be used sarcastically.
Your friend says he'll reach the rim before you in basketball, so you reply "NT Bud!" as a way of saying "Yeah Right!"
Also used to discourage. If someone says that they'll be able to touch rim (basketball) before you do (and you're taller than them,) you can say "NT Bud!" as "Not with your height!"