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(1) the foreskin which covers the glans of a man’s penis until sexual stimulation pushes the glans forward causing the foreskin to retract. This expression refers to the appearance of the emerging glans resembling a mouse emerging from a tunnel.

(2) A woman’s vagina.
(1) “Tommy and I made out in his room last night - he let me hold his mouse tunnel and watch his slippery pet come out to play!”

“I think Tommy has something a bit bigger than a mouse!”

“OK - you’re right - maybe it was a snake!”

(2) “Mrs. Robinson, I adore making love to you - you’re such a tight girl.”

“I adore your lovemaking Charlie Robinson, now you know why I call it my mouse tunnel!”
by Katie4eyes June 26, 2018
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