To put some object up your urethra.
"Man, did you hear what happened to John last night?"
"No, what?"
"His girlfriend did an insound on him."
by RageAgainstTheMichaelSheen October 2, 2022
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A person not to be trusted.
A person who also has a genital problem.
"Aw man, you heard about that Insound guy? He went to the doctor and they said he has erectile dysfunction."
by RageAgainstTheMichaelSheen September 25, 2022
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