1:A cokehead of usually the younger female, although can be male, persuasion who is convinced and will attempt to convince others that they are addicted to cocaine when they only do it rarely or at large parties.
2: A generally annoying younger cokehead
God, Amy is such a blowtard, she hardly ever did cocaine and now shes in rehab.
Amalgamation of "blowhard" and "retard," most thoroughly personified by Governor Rick Perry of Texas.
Did you hear what that Texas Governor Rick Perry said about global warming being a hoax to line the pockets of scientists? If not you'll undoubtedly hear it again, that blowtard loves the sound of his own voice.