To tranquilize some ones penis.
John: Yo what's up homie let me tringle your dingle
Jamal: No man I need my penis in approximately 10 seconds please do not tringle my dingle
James: Yea John don't tranquilize Jamal's penis
John: tringles Jamal's dingle anyways
When you are writing an assignment and you forget the 'a' in triangle