A phrase that beta-male cucks think is a funny way to say "no lie". In reality this is not a funny phrase and is not catching on.
Thought to be based on a show by the name of "Dave", created by rapper Lil' Dicky (a rapper whose name is a play on his... shortcomings), "On Dave" is commonly used by men lacking clout and/or dick game in an attempt to establish social dominance in a roguish and ape-like manner.
"Aw man, for real?"
"On Dave"
"No cap on a stack?"
"On Dave"