IFBIHNTDWS
It's Funny Because It Has Nothing To Do With Semen: an awkward term used to fill the silence after your dirty-minded friend makes a suggestive joke. people may start laughing, but not because you said something clever, just something stupid.
Dirty kid : "Yeah, Chase you got that stuff milk all over her shirt and face!"
Awkward kid: "IFBIHNTDWS.."
-spontaneous humiliation-
Awkward kid: "IFBIHNTDWS.."
-spontaneous humiliation-