Korean slang.There is NO exact English definition/translation, but it is close to things like obsessed, devoted, or love.
I guess that’s what it somewhat means, although of course the word has a totally different feel to it (nerdy vs street slang haha) . You can basically see “Bbuk-E-Ga-Yo” as falling for something, going crazy for something. It’s not used in terms of romantic love, but more as in when something is SOO awesome, that u can’t help so deep into it and just kinda.. falling into it totally and absolutely.
yo yo effect (n) - the action of a girl or boy from a past realationship toying with your emotions. Sending signals that they want you back and suddenly being very cold to you off and on. Sort of keeping you as a back up if their current realationship or intrest fails