Abbreviation for "Teenage DickHead." - a large subset of teenagers, almost always (99.9%) male, who enjoy acting like idiots, being obnoxious, and making fun of people for no good reason.

It is speculated that these teens have contracted a viral illness called "teenage dickheaditis," which can be caught as early as 13 years old. The infection clears by age 25, if not sooner.

Sometimes a really good ass-kicking will cure the infection spontaneously.

"Teenage DickHead.... its only Teenage DickHead.....
Their all DickHeads!" (song parody)
Jenny: "What are those guys going on the corner, drinking and insulting people for no reason?"

Mary: "What a bunch of fucking TDH's! They need to get their asses kicked!"
by N0tMyRe@lName February 18, 2010
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the new google pixel phone price is tdh
by SSnipes January 14, 2020
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a well known blackhat hacker who goes by the pseudonym of "tdh". tdh penetrated doxbin.org and 0x0539.net in early 2021
Guy1: omg doxbin got pwned again...
Guy2: by who?
Guy1: that hacker called tdh lol
by sdfdsgdfhgdfshgdfhjsdfha October 2, 2021
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