When a guy pulls his dick out when receiving a blowjob and slaps it against the other persons tongue or face.
Not sure how to give an example of Thwapping :/.
by Mr_Fabulous March 20, 2014
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the sound that occours when Tony Danza gives you a giant cock slap on your forhead
THWAP! you just got owned by tony danza
by american_jesus June 18, 2004
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Playful hit around the head, usually done with some sort of random object, such as a book.
Harriet gave Manda a thwap with a large tuna fish.
by Harriet---x November 18, 2006
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To rub or whack your girlfriend in the face with your penis. Preferably done unexpectedly and while an erection is present. A great way to wake them up!

Cousin of the dutch oven.
penis: thwap!

annoyed girlfriend: "why do you have to be so strange?"
by Josh V February 09, 2008
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to be hit smack in the middle of the forehead with a rather large penis
or the sound it produces
by John_OB tampon March 30, 2004
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a very quick cat slap or touch
in play, or when unsure about something, a cat will thwap the object, other cat or person
by lame cliche September 29, 2009
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