2 definitions by Orphanmaker

Blowing the bullshit whistle is method of calling someone out for not telling the truth about something. When a person knows a statement or story is total bullshit, he will make a “tweet-tweet” sound like a steam whistle. It’s especially handy in group settings like a smoking circle where the embarrassment for the liar can be maximized.
Todd: “Yo’, Chris. I heard you and Rabbit went to the club last night. How was it?”

Chris: “Dude, it was crazy. The bitches wouldn’t leave me alone. I guess they all wanted my potato dick.”

Rabbit: (exhaling an especially big bong rip) “Tweet-tweet. I'm totally blowing the bullshit whistle on that.”
by Orphanmaker July 11, 2011
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When out at a club or a party, being on the lookout for that one douchebag you want to avoid at all costs because he always latches onto you and your friends like a leech and basically ruins the fun for everyone. Because the person or persons on bag watch are essentially providing a life saving service to the rest of the group, they must have eyes like a hawk and be as stealthy as a ninja.
Todd: "Hey Rabbit, that party tonight at Kelly's should be fuckin' awesome. I just hope that Chris don't show up."

Rabbit: "Don't worry, dude. Matt and I are taking turns on bag watch, so if we see him, we will give everyone a heads up and we can all bail."

Todd: "Fuck yeah. With you guys on the case we definitely have no worries".
by Orphanmaker August 20, 2011
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