One who verbally masturbates his ego or mercilessly self-promotes. A jabobo will usually try to use language or knowledge that is confounding in order to make another believe that his own intellect is superior.
A man who watches your social media stories and your feed, but doesn't follow you, like your posts or comments to show support. Instead they cowardly hide in the shadows and attempt to slide their casual "hey" into your DMs. This is a result of their low self-esteem but high sense of entitlement for your attention.