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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.
thwap by Harriet---x November 22, 2006
Related Words
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?"
Thwap by Josh V February 9, 2008
to be hit smack in the middle of the forehead with a rather large penis
or the sound it produces
thwap by John_OB tampon March 30, 2004
1. Noun
A hit from a vape

2. Verb
To cause a potent nicotine buzz
1. "Hey, man, can I get a thwap?"

2. "Damn bro, this thing thwaps!"
Thwap by GregoryAlanMaddux February 6, 2020
noun. Short,loud,loose slapping sound.
As of large spider being sucked up a vacuum cleaner pipe.
thwap by Wlm Wheed May 8, 2005
a very quick cat slap or touch
in play, or when unsure about something, a cat will thwap the object, other cat or person
thwap by lame cliche September 29, 2009