Bebo is a word typically used to describe a hot guy, in Argentina. Any guy can be a bebo, but you only you and your friends know who really is one, and who is just a victim of an inside joke.
Ohh look at Jim, he is such a bebo!!
Look at this guy i made out with last night, he is a... bebo
A "bebo" is when you take your index finger and poke someone, multiple times if possible, in the buttocks, followed by saying "Bebo!" (I wouldn't recommend doing it to anyone besides sibilings)
Sibiling: Why did you poke me in the butt?!
Me: ...Bebo! Haha!
the legend, the icon, the moment, of stan twitter
"that was legendary, how did you do that?"
"omg my bebo blink era"