wallahi means i swear to allah, which is used by muslims, but has become famous in t-dot (origin in t-dot is silverthorncollegiate) because samoli's say it in almost every sentence.
wallahi i didnt take your hat.
wallahi who do u think u are?
wallahi stop saying wallahi
say wallah wallahi ballahi dallahi
The word wallahi is a word in arabic which means swear on God's name, Muslims use it as a way of showing that they are telling the truth.And some non-muslims use it for fun