It's a West African slang mostly used by Nigerians. When said, it's used to show respect, appreciation or salute someone with higher reputation or swag than you, or even jokingly with friends and family, most especially when you want something from them. For example: help or mostly money. It's said before and after the request has been granted.
In other words it's used for praising a person in other to get something.
When I saw the chief coming, I raised my hands up, stomped my feet and shouted, "twale sir!" and he gave me 50 Bucks immediately!
TWACK v. To strike with great force using the back of the middle finger (usually the nail) after coiling it under pressure against the opposing thumb. Accomplished twackers can inflict great welts upon their victim's flesh.
That turd cutter pissed me off, so I twacked him right in the munt!
On the first twack
Pope jumped like a macaque;
On the second twack
Pope was taken aback;
On the third twack
Lost his marbles the old hack.
(A. S. Pushkin)
Throw it on a dime Like ya'll ain't even trying
Just a kid from Briar Woods
I'm wearing number nine
Go travelin' down that Vandy
Flip to Happy Valley
Now I'm coming back and got the Natty on my mind
They can't touch my deep ball
Every game I'm scoring
I'm your favorite Quarterback
They call me Trace McSorley
Rep that Blue and White
You know I do it for the glory
Baker won the Hеisman, next up Trace McSorley