Top Definition
(verb) to bite down firmly on the penis when involved in felatio. Usually accidental but sometimes malicious.

Indirectly derived from "Deter" meaning "to discourage" and "ejaculate" meaning semen
"That really hurt when Gina <i>terjacked</i> me last night."

"If you don't tell me when, I'm gonna <i>terjack</i> you."
by G Ratt August 03, 2009

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