sandy tunnel

When you're getting a blow job on the beach and the person giving head involuntarily puts a sandy finger in the rectum of the person they are blowing.

"Hey, it wasn't cool last night when you gave me that 'sandy tunnel' without asking permission."

by hmh4820 October 29, 2014

Tunnel sand

Tunnel sand is a type of sand that a railway/railroad tunnel will produce organically. In the past, tunnel sand has proven to be quite explosive in nature which is triggered by the act of a locomotive entering any tunnel that is producing tunnel sand. Tunnel sand is also the type of sand that is widely used in children's sandboxes in playgrounds.

Gee whizz, I sure hope this tunnel sand doesn't explode.

by letmesubmitanamealready May 19, 2017