Acronym for Internal Pants Bulge Boy. i.e. a boy who constantly has a bulge in the internal section of his pants ( just above the penis)
"ZOMG Did you see Fulvio's internal pants bulge?"
" Yeah he always has one, we should start calling him IPBB"
IPBB is an acronym for intensely perverted bored boys.
The IPBB group sends e-mails around in their distribution group that is totally lame and silly. IPBB's hace a great ability to waste time.