A Tanner - Sticking big stuff in a guy's butt to keep it from squishing

Sticking big stuff in a guy's butt to keep it from squishing shut. Usually involves fancy oils and things that look like toilet plungers.

I just did a Tanner with my breakfast sandwich and a wine bottle.

My mom does a Tanner every morning with a sock and a rolling pin.

My dog tried to do a Tanner with a tennis ball and a pizza slice.