Another word to replace blah or if you feel a little frustrated or bored.Or if you get a little mad at someone.It can be used as a somewhat of a threat, even though it's not threatening.
Bwar! I'm so bored!
Bwar on you!
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug