It is a termed used as a substitution for saying anything that you are to nervous or afraid to say.
"How do you feel about Ronald" Jessica said
"blahhhh." Pete said
"blah?" Jessica said confused
5π 1π
When a decently attractive thot sends progressive thotty pic and u go "BLAHHHH"
Blahhhh- Thot *sends thotty pic*
when trying to finesse hoe for the sexually arousing photographs
1π 2π