I salute or hail you or well done.
It is used as an expression to cheer someone on or as a form of praise oftentimes regarding something good that someone has done.
Boy 1: I don hammer o! I got the contract!!!
Boy 2: Twale! Twale! O boy congrats o
Boy 1: I'm rich! I got the contract!!!
Boy 2: Well done!!! Salute! Congratulations friend.