Leaf a Like

The way Leafy used it
Leafy would usually use it to sign of videos or when promoting videos/channels

The way The Reptilian Brotherhood used it
Leaf a Like is usually used interchangeably with its sister jokes Hiss and #NiceShirt (spamming comment sections and chats of people that Leafy makes videos on/talks about). This was just to show that they had heard of the person/channel from Leafy and that's really it tbh. It's also used as a way to promote each other and to sign off there own posts.