Obviosly he was talking about Busoshoku Haki, he just didn't know the right name.
you guys are over estimating Busoshoku Haki . I am aware that it is something spiritual and can act as shield .But don't forget luffy's brute force was more than enough to break through boa's sisters Busoshoku Haki.
White Beard is known to have the best of Busoshoku Haki.The war arc is the best examplle where he displayed his awesomeness .Yet he was hit by some 200 bullets ,50 canons .Akainu managed to punch right through him.Again don't come with ur theory saying akainu used Busoshoku Haki .It was not mentioned in the manga nor the Anime.If busoshoku haki is so powerful ,why was WB not able to shield himself from the canons and bullets nor Akainu's punch
Some one even said Akainu killed Ace using busoshoku haki .Can you show me manga where it is stated like that .Read the chapter "The power that burns even fire ".In that chapter Akainu himself states ace's fire can't harm him cause he is magma clearly speaking of his elemental advantage over Ace.Do you think ODA is a fool to have written that chapter like that .show me one word of Akainu using busoshoku haki then why are propagating false theories.
Luffy even without busoshoku haki was able to defeat ENEL purely due to his elementel advantage .
with or without busoshoku haki ,Enel has an elemental advantage over akainu and akoji who have busoshoku haki ,lightning can penetrate their busoshoku haki
Just for the final touch up ,if busoshoku haki is so revered ,then why did sengoku's attack remained futile against BB's darkness element ?