Usually typed as brb, with the intent of bbn.
friend: sure =\
noob: yea, and then, bla bla bla...
cool guy: Hey man, brb.
*never comes back*
"yo. Kathryn. do you haz the hat?!?"
"lemme open the locker and get it"
"WOOT. i'll join you. ima finish my activia first, though."
"we are soooo cool"