The act of pressing a nice firm set of breasts together, preferrably with the nips touching, then with the lips blowing between them in a whistling fashion as to enact the TITWHISTLE!
girl: What are you doing to my breasts you crazy ass?!?!

Man: Shut it! I'm enacting a Titwhistle!!! HOORAHHH!!! WHODEWHO!!!!!

by Travis MoCo November 15, 2008
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The noisy thing that whistles when the water in the kettle comes to a boil.
I was alerted to the boiling by the shreak of the kettles titwhistle.
by Mingot February 17, 2014
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